NCP3335AMNADJR2G [ONSEMI]
Ultra High Accuracy, Low Iq, 500 mA Low Dropout Regulator; 超高精度，低IQ 500 mA低压差稳压器
| 型号： | NCP3335AMNADJR2G |
| 厂家： | 
ONSEMI |
| 描述： | Ultra High Accuracy, Low Iq, 500 mA Low Dropout Regulator |
| 文件： | 总15页 (文件大小：129K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NCP3335A
Ultra High Accuracy,
Low Iq, 500 mA
Low Dropout Regulator
The NCP3335A is a high performance, low dropout regulator. With
accuracy of 0.9% over line and load and ultra−low quiescent current
and noise it encompasses all of the necessary features required by
today’s consumer electronics. This unique device is guaranteed to be
stable without a minimum load current requirement and stable with
any type of capacitor as small as 1.0 mF. The NCP3335A also comes
equipped with sense and noise reduction pins to increase the overall
utility of the device. The NCP3335A offers reverse bias protection.
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Micro8t
DM SUFFIX
CASE 846A
DFN10
MN SUFFIX
CASE 485C
Features
• High Accuracy Over Line and Load (+0.9% at 255C)
• Ultra−Low Dropout Voltage at Full Load (260 mV typ.)
• No Minimum Output Current Required for Stability
• Low Noise (35 mVrms w/10 nF C and 56 mVrms w/out C )
nr
nr
MARKING DIAGRAM
• Low Shutdown Current (0.07 mA)
• Reverse Bias Protected
Fixed Version
Adj Version
Pin 1, 2. V
Pin 1, 2. V
8
1
out
out
3. Adj
4. GND
5. NR
6. SD
• 2.6 V to 12 V Supply Range
3. Sense
4. GND
5. NR
xxx
AYWG
G
• Thermal Shutdown Protection
• Current Limitation
6. SD
• Requires Only 1.0 mF Output Capacitance for Stability
• Stable with Any Type of Capacitor (including MLCC)
7, 8. V
7, 8. V
in
in
• Available in 2.5 V, 2.85 V, 3.3 V, 5.0 V and Adjustable Output
Fixed Version
Pin 1, 2. V
Adj Version
Pin 1, 2. V
Voltages
out
out
3. Adj
4. GND
5, 6. NC
7. NR
1
3335A
xxx
3. Sense
4. GND
• These are Pb−Free Devices
ALYWG
5, 6. NC
Applications
G
7. NR
8. SD
9, 10. V
• PCMCIA Card
• Cellular Phones
8. SD
9, 10. V
in
in
• Camcoders and Cameras
• Networking Systems, DSL/Cable Modems
• Cable Set−Top Box
• MP3/CD Players
Micro8
DFN10
xxx = LIQ for 2.5 V
= LIR for 2.85 V
= LIS for 3.3 V
= LIT for 5.0 V
= LIO for Adj.
xxx = 25 for 2.5 V
= 285 for 2.85 V
= 33 for 3.3 V
= 50 for 5.0 V
= ADJ for Adj.
• DSP Supply
A
L
= Assembly Location
= Wafer Lot
• Displays and Monitors
Y
W
G
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
©
Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
April, 2006 − Rev. 3
NCP3335A/D
NCP3335A
C
nr
(Optional)
5
NR
SENSE
OUT
3
2
1
7
8
IN
IN
V
in
V
out
OUT
+
+
C
1.0 mF
out
C
1.0 mF
in
GND
4
SD
6
ON
OFF
Figure 1. Typical Fixed Version Application Schematic (Micro8 Package)
C
nr
10 nF
(Optional)
5
NR
2
1
OUT
OUT
7
8
V
out
IN
IN
C
68 pF
ADJ
R1
R2
+
3
C
1.0 mF
out
V
ADJ
in
+
C
in
GND
4
SD
1.0 mF
6
ON
OFF
Figure 2. Typical Adjustable Version Application Schematic (Micro8 Package)
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2
NCP3335A
PIN FUNCTION DESCRIPTION
Fixed Version
Micro8
Pin No.
DFN10
Pin No.
Pin Name
Description
1, 2
3
1, 2
3
V
Regulated output voltage. Bypass to ground with C w 1.0 mF.
out
out
SENSE
GND
NR
For output voltage sensing, connect to Pins 1 and 2.
Power Supply Ground
4
4
5
7
Noise Reduction Pin. This is an optional pin used to further reduce noise.
Shutdown pin. When not in use, this pin should be connected to the input pin.
Power Supply Input Voltage
6
8
SD
7, 8
−
9, 10
5, 6
EPAD
V
in
NC
Not Connected
−
EPAD
Exposed thermal pad should be connected to ground.
Adjustable Version
1, 2
3
1, 2
3
V
Regulated output voltage. Bypass to ground with C w 1.0 mF.
out
out
Adj
GND
NR
Adjustable pin; reference voltage = 1.25 V.
Power Supply Ground
4
4
5
7
Noise Reduction Pin. This is an optional pin used to further reduce noise.
Shutdown pin. When not in use, this pin should be connected to the input pin.
Power Supply Input Voltage
6
8
SD
7, 8
−
9, 10
5, 6
EPAD
V
in
NC
Not Connected
−
EPAD
Exposed thermal pad should be connected to ground.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
V
Input Voltage
V
in
−0.3 to +16
Output Voltage
V
out
−0.3 to V +0.3 or 10 V*
V
in
Shutdown Pin Voltage
Thermal Characteristics
V
−0.3 to +16
238
V
sh
Thermal Resistance, Junction−to−Air
R
q
°C/W
°C
JA
Operating Junction Temperature Range, Micro8
Storage Temperature Range
T
−40 to +150
−50 to+150
J
T
stg
°C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
NOTE: This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) JESD 22−A114−B
Machine Model (MM) JESD 22−A115−A
*Which ever is less. Reverse bias protection feature valid only if V − V ≤ 7 V.
out
in
THERMAL CHARACTERISTICS
Test Conditions (Typical Value)
Min Pad Board (Note 1)
1, Pad Board (Note 1)
Characteristic
Micro 8
Unit
Junction−to−Air, qJA
Junction−to−Pin, yJL2
10 Lead DFN EPad
Junction−to−Air, qJA
Junction−to−Pin, yJL2
264
110
174
100
°C/W
°C/W
215
55
66
17
°C/W
°C/W
1. As mounted on a 35 x 35 x 1.5 mm FR4 Substrate, with a single layer of a specified copper area of 2 oz (0.07 mm thick) copper traces and
heat spreading area. JEDEC 51 specifications for a low and high conductivity test board recommend a 2 oz copper thickness. Test conditions
are under natural convection or zero air flow.
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3
NCP3335A
ELECTRICAL CHARACTERISTICS − 2.5 V (V = 2.5 V typical, V = 2.9 V, T = −40°C to +85°C, unless otherwise noted)
out
in
A
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
= 2.9 V to 6.5 V, I
V
out
−0.9%
2.477
2.5
+0.9%
2.523
V
V
= 0.1 mA to 500 mA, T = 25°C
in
load
J
Output Voltage (Accuracy)
= 2.9 V to 6.5 V, I
V
−1.4%
2.465
2.5
2.5
+1.4%
2.535
V
V
out
V
in
= 0.1 mA to 500 mA, T = 0°C to +85°C
load
J
Output Voltage (Accuracy), (Note 2)
V
out
−1.5%
2.462
+1.5%
2.538
V
in
= 2.9 V to 6.5 V, I
= 0.1 mA to 500 mA, T = −40°C to +150°C
load
J
Line Regulation
= 2.9 V to 12 V, I
Line
0.04
0.04
mV/V
mV/mA
mV
Reg
V
in
= 0.1 mA
load
Load Regulation
= 2.9 V, I
Load
Reg
V
= 0.1 mA to 500 mA
load
in
Dropout Voltage (See App Note)
V
DO
I
I
I
I
= 500 mA (Note 3)
= 300 mA (Note 3)
= 50 mA
340
230
110
10
load
load
load
load
= 0.1mA
Peak Output Current (See Figure 7)
Short Output Current (See Figure 7)
Thermal Shutdown
I
I
500
700
160
800
900
mA
mA
°C
pk
sc
T
J
Ground Current
In Regulation
I
GND
I
I
I
I
= 500 mA (Note 3)
= 300 mA (Note 3)
= 50 mA
9.0
4.6
0.8
−
14
7.5
2.5
190
load
load
load
load
mA
= 0.1 mA
mA
In Dropout
= 2.4 V, I
V
in
= 0.1 mA
load
500
1.0
mA
mA
In Shutdown
= 0 V
S
I
0.07
D
GNDsh
Output Noise
V
noise
C
nr
C
nr
= 0 nF, I
= 10 nF, I
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
56
35
mVrms
mVrms
load
out
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
load
out
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
V
V
0.4
1.0
1.0
SD Input Current, V = 0 V to 0.4 V or V = 2.0 V to V
I
0.07
0.07
10
mA
mA
mA
SD
SD
in
SD
Output Current In Shutdown Mode, V = 0 V
I
OSD
out
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(V = 0 V, V = 2.5 V)
I
OUTR
in
out_forced
2. For output current capability for T < 0°C, please refer to Figure 9.
J
3. T must be greater than 0°C.
A
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4
NCP3335A
ELECTRICAL CHARACTERISTICS − 2.85 V (V = 2.85 V typical, V = 3.25 V, T = −40°C to +85°C, unless otherwise noted)
out
in
A
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
= 3.25 V to 6.85 V, I
V
−0.9%
2.824
2.85
+0.9%
2.876
V
out
V
in
= 0.1 mA to 500 mA, T = 25°C
load
load
J
Output Voltage (Accuracy)
= 3.25 V to 6.85 V, I
V
out
−1.4%
2.810
2.85
2.85
0.04
0.04
+1.4%
2.890
V
V
V
in
= 0.1 mA to 500 mA, T = 0°C to +85°C
J
Output Voltage (Accuracy) (Note 4)
= 3.25 V to 6.85 V, I = 0.1 mA to 500 mA, T = −40°C to +150°C
V
out
−1.5%
2.807
+1.5%
2.893
V
in
load
J
Line Regulation
= 3.25 V to 12 V, I
Line
mV/V
mV/mA
mV
Reg
V
= 0.1 mA
load
in
Load Regulation
= 3.25 V, I
Load
Reg
V
= 0.1 mA to 500 mA
load
in
Dropout Voltage (See App Note)
V
DO
I
I
I
I
= 500 mA
= 300 mA
= 50 mA
= 0.1mA
340
230
110
10
load
load
load
load
Peak Output Current (See Figure 7)
Short Output Current (See Figure 7)
Thermal Shutdown
I
I
500
700
160
800
900
mA
mA
°C
pk
sc
T
J
Ground Current
In Regulation
I
GND
I
I
I
I
= 500 mA (Note 5)
= 300 mA
= 50 mA
9.0
4.6
0.8
−
14
7.5
2.5
190
load
load
load
load
mA
= 0.1 mA
mA
In Dropout
= 2.75 V, I
V
in
= 0.1 mA
load
−
500
1.0
mA
mA
In Shutdown
SD = 0 V
I
0.07
GNDsh
Output Noise
V
noise
C
nr
C
nr
= 0 nF, I
= 10 nF, I
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
61
40
mVrms
mVrms
load
out
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
load
out
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
V
V
0.4
1.0
1.0
S
Input Current, V = 0 V to 0.4 V or V = 2.0 V to V
I
0.07
0.07
10
mA
mA
mA
D
SD
SD
in
SD
Output Current In Shutdown Mode, V = 0 V
I
OSD
out
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(V = 0 V, V = 2.85 V)
I
OUTR
in
out_forced
4. For output current capability for T < 0°C, please refer to Figure 8.
J
5. T must be greater than 0°C.
A
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5
NCP3335A
ELECTRICAL CHARACTERISTICS – 3.3 V (V = 3.3 V typical, V = 3.7 V, T = −40°C to +85°C, unless otherwise noted)
out
in
A
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
= 3.7 V to 7.3 V, I
V
out
−0.9%
3.270
3.3
+0.9%
3.330
V
V
= 0.1 mA to 500 mA, T = 25°C
in
load
J
Output Voltage (Accuracy)
= 3.7 V to 7.3 V, I
V
−1.4%
3.254
3.3
3.3
+1.4%
3.346
V
V
out
V
in
= 0.1 mA to 500 mA, T = 0°C to +85°C
load
J
Output Voltage (Accuracy)
V
out
−1.5%
3.250
+1.5%
3.350
V
in
= 3.7 V to 7.3 V, I
= 0.1 mA to 500 mA, T = −40°C to +150°C
load
J
Line Regulation
= 3.7 V to 12 V, I
Line
0.04
0.04
mV/V
mV/mA
mV
Reg
V
in
= 0.1 mA
load
Load Regulation
= 3.7 V, I
Load
Reg
V
in
= 0.1 mA to 500 mA
load
Dropout Voltage (See App Note)
V
DO
I
I
I
I
= 500 mA
= 300 mA
= 50 mA
= 0.1 mA
340
230
110
10
load
load
load
load
Peak Output Current (See Figure 7)
Short Output Current (See Figure 7)
Thermal Shutdown
Ipk
500
700
160
800
900
mA
mA
°C
I
sc
T
J
Ground Current
In Regulation
I
GND
I
I
I
I
= 500 mA (Note 6)
= 300 mA
= 50 mA
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
mA
mA
mA
load
load
load
load
= 0.1 mA
In Dropout
= 3.2 V, I
V
in
= 0.1 mA
load
−
500
1.0
In Shutdown
= 0 V
S
I
0.07
D
GNDsh
Output Noise
V
noise
C
nr
C
nr
= 0 nF, I
= 10 nF, I
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
69
46
mVrms
mVrms
load
out
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
load
out
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
V
V
0.4
1.0
1.0
S
Input Current, V = 0 V to 0.4 V or V = 2.0 V to V
I
0.07
0.07
10
mA
mA
mA
D
SD
SD
in
SD
Output Current In Shutdown Mode, V = 0 V
I
OSD
out
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(V = 0 V, V = 3.3 V)
I
OUTR
in
out_forced
6. T must be greater than 0°C.
A
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6
NCP3335A
ELECTRICAL CHARACTERISTICS – 5.0 V (V = 5.0 V typical, V = 5.4 V, T = −40°C to +85°C, unless otherwise noted)
out
in
A
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
= 5.4 V to 9.0 V, I
V
out
−0.9%
4.955
5.0
+0.9%
5.045
V
V
= 0.1 mA to 500 mA, T = 25°C
in
load
J
Output Voltage (Accuracy)
= 5.4 V to 9.0 V, I
V
−1.4%
4.930
5.0
5.0
+1.4%
5.070
V
V
out
V
in
= 0.1 mA to 500 mA, T = 0°C to +85°C
load
J
Output Voltage (Accuracy)
V
out
−1.5%
4.925
+1.5%
5.075
V
in
= 5.4 V to 9.0 V, I
= 0.1 mA to 500 mA, T = −40°C to +150°C
load
J
Line Regulation
= 5.4 V to 12 V, I
Line
0.04
0.04
mV/V
mV/mA
mV
Reg
V
in
= 0.1 mA
load
Load Regulation
= 5.4 V, I
Load
Reg
V
in
= 0.1 mA to 500 mA
load
Dropout Voltage (See App Note)
V
DO
I
I
I
I
= 500 mA
= 300 mA
= 50 mA
= 0.1 mA
340
230
110
10
load
load
load
load
Peak Output Current (See Figure 7)
Short Output Current (See Figure 7)
Thermal Shutdown
Ipk
500
700
160
830
930
mA
mA
°C
I
sc
T
J
Ground Current
In Regulation
I
GND
I
I
I
I
= 500 mA (Note 7)
= 300 mA (Note 7)
= 50 mA
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
mA
mA
mA
load
load
load
load
= 0.1 mA
In Dropout
= V −0.1 V, I = 0.1 mA
load
V
in
−
500
1.0
out
In Shutdown
= 0 V
S
I
0.07
D
GNDsh
Output Noise
V
noise
C
nr
C
nr
= 0 nF, I
= 10 nF, I
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
93
58
mVrms
mVrms
load
out
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
load
out
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
V
V
0.4
1.0
1.0
S
Input Current, V = 0 V to 0.4 V or V = 2.0 V to V
I
0.07
0.07
10
mA
mA
mA
D
SD
SD
in
SD
Output Current In Shutdown Mode, V = 0 V
I
OSD
out
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(V = 0 V, V = 5.0 V)
I
OUTR
in
out_forced
7. T must be greater than 0°C.
A
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7
NCP3335A
ELECTRICAL CHARACTERISTICS – Adjustable (V = 1.25 V typical, V = 2.9 V, T = −40°C to +85°C, unless otherwise noted)
out
in
A
Characteristic
Symbol
Min
Typ
Max
Unit
Reference Voltage (Accuracy)
= 2.9 V to V + 4.0 V, I
V
V
V
−0.9%
1.239
1.25
+0.9%
1.261
V
ref
ref
ref
V
in
= 0.1 mA to 500 mA, T = 25°C
out
load
J
Reference Voltage (Accuracy)
= 2.9 V to V + 4.0 V, I
−1.4%
1.233
1.25
1.25
0.04
0.04
+1.4%
1.268
V
V
V
in
= 0.1 mA to 500 mA, T = 0°C to +85°C
out
load
J
Reference Voltage (Accuracy) (Note 8)
= 2.9 V to V + 4.0 V, I = 0.1 mA to 500 mA, T = −40°C to +150°C
−1.5%
1.231
+1.5%
1.269
V
in
out
load
J
Line Regulation
= 2.9 V to 12 V, I
Line
mV/V
mV/mA
mV
Reg
V
= 0.1 mA
load
in
Load Regulation
= 2.9 V, I
Load
Reg
V
in
= 0.1 mA to 500 mA
load
Dropout Voltage (See App Note), V = 2.5 V to 10 V
V
DO
out
I
I
I
I
= 500 mA (Note 9)
= 300 mA
= 50 mA
340
230
110
10
load
load
load
load
= 0.1 mA
Peak Output Current (Note 9) (See Figure 7)
Short Output Current (See Figure 7)
Ipk
500
700
160
860
mA
mA
V
≤ 3.3 V
> 3.3 V
I
900
990
out
sc
V
out
Thermal Shutdown
T
°C
J
Ground Current
In Regulation
I
GND
I
I
I
I
= 500 mA (Note 9)
= 300 mA (Note 9)
= 50 mA
9.0
4.6
0.8
−
14
7.5
2.5
190
mA
mA
mA
mA
load
load
load
load
= 0.1 mA
In Dropout
= V −0.1 V, I = 0.1 mA
load
V
in
−
500
1.0
out
In Shutdown
= 0 V
S
I
0.07
D
GNDsh
Output Noise
V
noise
C
nr
C
nr
= 0 nF, I
= 10 nF, I
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
38
26
mVrms
mVrms
load
out
= 500 mA, f = 10 Hz to 100 kHz, C = 10 mF
load
out
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
2.0
V
V
0.4
S
Input Current, V = 0 V to 0.4 V or V = 2.0 V to V
V
V
≤ 5.4 V
> 5.4 V
I
0.07
1.0
5.0
mA
D
SD
SD
in
in
in
SD
Output Current In Shutdown Mode, V = 0 V
I
0.07
1.0
1.0
mA
mA
out
OSD
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(V = 0 V, V = V (nom) ≤ 7 V) (Note 10)
I
OUTR
in
out_forced
out
8. For output current capability for T < 0°C, please refer to Figure 9.
J
9. T must be greater than 0°C.
A
10.Reverse bias protection feature valid only if V − V ≤ 7 V.
out
in
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8
NCP3335A
400
350
300
250
200
150
100
50
12
10
8
500 mA
300 mA
500 mA
6
300 mA
4
50 mA
60
2
50 mA
0
0
0
20
40
80
100
120
140
0
20
40
60
80
T (°C)
100
120
140
T (°C)
J
J
Figure 3. Dropout Voltage vs. Temperature
Figure 4. Ground Current vs. Temperature
1000
900
800
700
600
500
400
300
200
100
0
2.550
2.540
2.530
2.520
2.510
2.500
2.490
2.480
2.470
2.460
2.450
I
sc
I
pk
0
20
40
60
80
100
120
140
−40 −20
0
20
40
60
80 100 120 140
T (°C)
J
T (°C)
J
Figure 5. Output Voltage vs. Temperature
Figure 6. Peak and Short Current
vs. Temperature
0.97 V
out
I
I
sc
I
(mA)
pk
out
(For specific values of I and I , please refer to Figure 6)
pk
sc
Figure 7. Output Voltage vs. Output Current
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9
NCP3335A
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0°C
−10°C
0°C
−20°C
−40°C
−40°C
−30°C
−20°C
3.85 3.75 3.65 3.55 3.45 3.35 3.25 3.15 3.05 2.95 2.85
3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5
, (V)
V
(V)
V
IN
IN
Figure 8. Output Current Capability for the
2.85 V Version
Figure 9. Output Current Capability for the
2.5 V Version
100
90
80
70
60
50
40
30
20
10
0
500
450
400
350
300
250
200
150
100
50
C
C
= 1.0 mF
= 0 nF
out
nr
C
C
= 10 mF
= 0 nF
out
nr
50 mA
250 mA
500 mA
C
out
= 1.0 mF
C
nr
= 10 nF
V
C
= 2.5 V
= 10 mF
T = 25°C
out
V
= 2.5 V
= 500 mA
out
out
I
out
C = 10 mF
out
J
T = 25°C
J
C
nr
= 10 nF
0
0.01
0.1
1.0
10
100
0.01
0.1
1.0
10
100
F, FREQUENCY (kHz)
F, FREQUENCY (kHz)
Figure 11. Output Noise Density
Figure 10. Ripple Rejection vs. Frequency
5.10
5.05
5.00
4.95
4.90
4.85
V
= 5 V
OUT
−40 −15
10
35
60
85
110 135 150
TEMPERATURE (°C)
Figure 12. Output Voltage vs. Temperature
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10
NCP3335A
350
300
250
200
150
300
250
200
150
100
1 oz CF
2 oz CF
1 oz CF
2 oz CF
100
50
0
50
0
0
100
200
300
400
500
600
700
0
100
200
300
400
500
600
700
2
2
COPPER HEAT SPREADING AREA (mm )
COPPER HEAT SPREADING AREA (mm )
Figure 13. Micro 8 Self Heating Thermal
Characteristic as a Function of Copper Area
on the PCB
Figure 14. DFN 10 Self Heating Thermal
Characteristic as a Function of Copper Area
on the PCB
15
V
in
at Data Sheet Test Conditions,
25°C, 1 mF Capacitance
10
Unstable Area
Stable Area
5.0
0
0
100
200
300
400
500
OUTPUT CURRENT (mA)
Figure 15. Stability with ESR vs. Iout
15
10
5 V, 0.1 mF
5 V, 10 mF
5 V, 1.0 mF
1.25 V, M8
5.0
0
Min ESR
0
100
200
300
400
500
OUTPUT CURRENT (mA)
Figure 16. Output Current vs. ESR
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11
NCP3335A
APPLICATIONS INFORMATION
Reverse Bias Protection
is recommended to further reduce output noise and improve
stability.
Reverse bias is a condition caused when the input voltage
goes to zero, but the output voltage is kept high either by a
large output capacitor or another source in the application
which feeds the output pin.
Normally in a bipolar LDO all the current will flow from
the output pin to input pin through the PN junction with
limited current capability and with the potential to destroy
the IC.
Due to an improved architecture, the NCP3335A can
withstand up to 7.0 V on the output pin with virtually no
current flowing from output pin to input pin, and only
negligible amount of current (tens of mA) flowing from the
output pin to ground for infinite duration.
Adjustable Operation
The output voltage can be set by using a resistor divider
as shown in Figure 2 with a range of 1.25 to 10 V. The
appropriate resistor divider can be found by solving the
equation below. The recommended current through the
resistor divider is from 10 mA to 100 mA. This can be
accomplished by selecting resistors in the kW range. As
result, the I *R2 becomes negligible in the equation and
adj
can be ignored.
R1
R2
(eq. 1)
+ 1.25 * ǒ1 ) Ǔ) I
V
out
* R2
adj
Example:
Input Capacitor
For V = 2.9 V, can use R = 36 kW and R = 27 kW.
out
1
2
An input capacitor of at least 1.0 mF, any type, is
recommended to improve the transient response of the
regulator and/or if the regulator is located more than a few
inches from the power source. It will also reduce the circuit’s
sensitivity to the input line impedance at high frequencies.
The capacitor should be mounted with the shortest possible
track length directly across the regular’s input terminals.
36 kW
(eq. 2)
1.25 * ǒ1 ) Ǔ+ 2.91 V
27 kW
Dropout Voltage
The voltage dropout is measured at 97% of the nominal
output voltage.
Thermal Considerations
Output Capacitor
Internal thermal limiting circuitry is provided to protect the
integrated circuit in the event that the maximum junction
temperature is exceeded. This feature provides protection
from a catastrophic device failure due to accidental
overheating. This protection feature is not intended to be used
as a substitute to heat sinking. The maximum power that can
be dissipated, can be calculated with the equation below:
The NCP3335A remains stable with any type of capacitor
as long as it fulfills its 1.0 mF requirement. There are no
constraints on the minimum ESR and it will remain stable up
to an ESR of 5.0 W. Larger capacitor values will improve the
noise rejection and load transient response.
Noise Reduction Pin
Output noise can be greatly reduced by connecting a 10 nF
T
* T
A
J(max)
(eq. 3)
P
D
+
capacitor (C ) between the noise reduction pin and ground
nr
R
qJA
(see Figure 1). In applications where very low noise is not
required, the noise reduction pin can be left unconnected.
For improved thermal performance, contact the factory
for the DFN package option. The DFN package includes an
exposed metal pad that is specifically designed to reduce the
For the adjustable version, in addition to the 10 nF C , a
nr
68 pF capacitor connected in parallel with R1 (see Figure 2)
junction to air thermal resistance, R
.
qJA
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12
NCP3335A
ORDERING INFORMATION
Device
†
Nominal Output Voltage
Package
Shipping
NCP3335ADM250R2G
2.5 V
2.85 V
3.3 V
5.0 V
Adj.
Micro8
(Pb−Free)
4000 / Tape & Reel
4000 / Tape & Reel
4000 / Tape & Reel
4000 / Tape & Reel
4000 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
3000 / Tape & Reel
NCP3335ADM285R2G
NCP3335ADM330R2G
NCP3335ADM500R2G
NCP3335ADMADJR2G
NCP3335AMN250R2G
NCP3335AMN285R2G
NCP3335AMN330R2G
NCP3335AMN500R2G
NCP3335AMNADJR2G
Micro8
(Pb−Free)
Micro8
(Pb−Free)
Micro8
(Pb−Free)
Micro8
(Pb−Free)
2.5 V
2.85 V
3.3 V
5.0 V
Adj.
DFN10
(Pb−Free)
DFN10
(Pb−Free)
DFN10
(Pb−Free)
DFN10
(Pb−Free)
DFN10
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*Please contact factory for other voltage options.
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13
NCP3335A
PACKAGE DIMENSIONS
Micro8
CASE 846A−02
ISSUE G
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
D
3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED
0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE.
5. 846A−01 OBSOLETE, NEW STANDARD 846A−02.
H
E
E
MILLIMETERS
INCHES
NOM
−−
0.003
0.013
0.007
0.118
DIM
A
A1
b
c
D
MIN
−−
NOM
−−
MAX
MIN
−−
MAX
0.043
0.006
0.016
0.009
0.122
0.122
PIN 1 ID
1.10
0.15
0.40
0.23
3.10
3.10
e
0.05
0.25
0.13
2.90
2.90
0.08
0.002
0.010
0.005
0.114
0.114
b 8 PL
0.33
M
S
S
0.08 (0.003)
T B
A
0.18
3.00
E
3.00
0.118
e
L
H
E
0.65 BSC
0.55
4.90
0.026 BSC
0.021
0.193
0.40
4.75
0.70
5.05
0.016
0.187
0.028
0.199
SEATING
PLANE
−T−
A
0.038 (0.0015)
L
A1
c
SOLDERING FOOTPRINT*
1.04
0.38
8X
8X 0.041
0.015
3.20
4.24
5.28
0.126
0.167 0.208
0.65
6X0.0256
SCALE 8:1
mm
inches
ǒ
Ǔ
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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14
NCP3335A
PACKAGE DIMENSIONS
DFN10
CASE 485C−01
ISSUE A
D
A
B
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
EDGE OF PACKAGE
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
5. TERMINAL b MAY HAVE MOLD COMPOUND
MATERIAL ALONG SIDE EDGE. MOLD
FLASHING MAY NOT EXCEED 30 MICRONS
ONTO BOTTOM SURFACE OF TERMINAL b.
6. DETAILS A AND B SHOW OPTIONAL VIEWS
FOR END OF TERMINAL LEAD AT EDGE OF
PACKAGE.
L1
E
PIN 1
DETAIL A
REFERENCE
Bottom View
(Optional)
2X
0.15
C
TOP VIEW
MILLIMETERS
2X
0.15
C
DIM MIN
0.80
A1 0.00
MAX
1.00
0.05
A
(A3)
A3
b
D
D2 2.45
E
0.20 REF
DETAIL B
0.10
0.08
C
C
0.18
0.30
3.00 BSC
2.55
3.00 BSC
1.85
0.50 BSC
0.19 TYP
A
SEATING
PLANE
10X
E2 1.75
e
K
L
SIDE VIEW
A1
C
0.35
0.45
0.03
L1 0.00
D2
e
DETAIL A
EXPOSED Cu
10X
L
MOLD CMPD
1
5
A3
E2
A1
10X
K
DETAIL B
Side View
(Optional)
10
6
10X b
0.10 C A
B
BOTTOM VIEW
0.05
C
NOTE 3
The products described herein NCP3335A, may be covered by one or more of the following U.S. patents; 5,920,184, 5,966,004, and 5,834,926. There may
be other patents pending.
Micro8 is a trademark of International Rectifier.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
ON Semiconductor Website: http://onsemi.com
Order Literature: http://www.onsemi.com/litorder
Literature Distribution Center for ON Semiconductor
P.O. Box 61312, Phoenix, Arizona 85082−1312 USA
Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada
Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada
Email: orderlit@onsemi.com
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2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051
Phone: 81−3−5773−3850
For additional information, please contact your
local Sales Representative.
NCP3335A/D
相关型号：
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