LD3985XX13 [ETC]
ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE ; 超低压降低噪声BICMOS稳压器低ESR电容兼容\n型号: | LD3985XX13 |
厂家: | ETC |
描述: | ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE
|
文件: | 总12页 (文件大小:441K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LD3985
SERIES
ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE
REGULATORS LOW ESR CAPACITORS COMPATIBLE
■
■
INPUT VOLTAGE FROM 2.5V TO 6V
STABLE WITH LOW ESR CERAMIC
CAPACITORS
■
■
ULTRA LOW DROPOUT VOLTAGE (100mV
TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA
LOAD)
VERY LOW QUIESCENT CURRENT (85µA
TYP. AT NO LOAD, 170µA TYP. AT 150mA
LOAD; MAX 1.5µA IN OFF MODE)
GUARANTEED OUTPUT CURRENT UP TO
150mA
WIDE RANGE OF OUTPUT VOLTAGE:
1.25V; 1.35; 1.5; 1.8V; 2V; 2.1V; 2.2V; 2.4V;
2.5V; 2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V;
3.2V; 3.3V; 4.7V; 5V
Flip-Chip
(1.57x1.22)
SOT23-5L
■
■
The ultra low drop-voltage, low quiescent current
and low noise make it suitable for low power
applications and in battery powered systems.
Regulator ground current increases only slightly in
dropout, further prolonging the battery life. Power
supply rejection is better than 60 dB at low
frequencies and starts to roll off at 10KHz. High
power supply rejection is maintained down to low
input voltage levels common to battery operated
circuits. Shutdown Logic Control function is
available, this means that when the device is used
as local regulator, it is possible to put a part of the
board in standby, decreasing the total power
consumption. The LD3985 is designed to work
with low ESR ceramic capacitors. Typical
applications are in mobile phone and similar
battery powered wireless systems.
■
■
FAST TURN-ON TIME: TYP. 200µs [C =1µF,
O
C
= 10nF AND I =1mA]
O
BYP
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
INTERNAL CURRENT AND THERMAL LIMIT
OUTPUT LOW NOISE VOLTAGE 30µVRMS
OVER 10Hz to 100KHz
S.V.R. OF 60dB AT 1KHz, 50dB AT 10KHz
TEMPERATURE RANGE: -40°C TO 125°C
■
■
■
■
DESCRIPTION
The LD3985 provides up to 150mA, from 2.5V to
6V input voltage.
SCHEMATIC DIAGRAM
July 2003
1/12
LD3985 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
DC Input Voltage
DC Output Voltage
INHIBIT Input Voltage
Output Current
-0.3 to 6 (*)
V
V
V
I
V
-0.3 to V +0.3
O
I
V
-0.3 to V +0.3
INH
I
I
Internally limited
Internally limited
-65 to 150
O
P
Power Dissipation
D
T
Storage Temperature Range
°C
°C
STG
T
Operating Junction Temperature Range
-40 to 125
OP
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
(*) The input pin is able to withstand non repetitive spike of 6.5V for 200ms.
THERMAL DATA
Symbol
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
SOT23-5L
Flip-Chip
Unit
R
81
°C/W
°C/W
thj-case
R
255
170
thj-amb
CONNECTION DIAGRAM (top view for SOT, top through view for Flip-Chip)
SOT23-5L
Flip-Chip
PIN DESCRIPTION
Pin N°
SOT23-5L Flip-Chip
Pin N°
Symbol
Name and Function
1
4
V
Input Voltage of the LDO
I
2
3
2
1
GND
Common Ground
V
Inhibit Input Voltage: ON MODE when V
≥ 1.2V, OFF MODE when V
≤
INH
INH
INH
0.4V (Do not leave floating, not internally pulled down/up)
4
5
5
3
BYPASS
Bypass Pin: Connect an external capacitor (usually 10nF) to minimize noise
voltage
V
Output Voltage of the LDO
O
2/12
LD3985 SERIES
ORDERING CODES
SOT23-5L
Flip-Chip
OUTPUT VOLTAGES
LD3985M125R
LD3985M135R
LD3985M15R
LD3985M18R
LD3985M20R
LD3985M21R
LD3985M22R
LD3985M24R
LD3985M25R
LD3985M26R
LD3985M27R
LD3985M28R
LD3985M285R
LD3985M29R
LD3985M30R
LD3985M31R
LD3985M32R
LD3985M33R
LD3985M47R
LD3985M48R
LD3985M49R
LD3985M50R
LD3985J125R
LD3985J135R
LD3985J15R
LD3985J18R
LD3985J20R
LD3985J21R
LD3985J22R
LD3985J24R
LD3985J25R
LD3985J26R
LD3985J27R
LD3985J28R
LD3985J285R
LD3985J29R
LD3985J30R
LD3985J31R
LD3985J32R
LD3985J33R
LD3985J47R
LD3985J48R
LD3985J49R
LD3985J50R
1.25 V
1.35 V
1.5 V
1.8 V
2.0 V
2.1 V
2.2 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.85 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
4.7 V
4.8 V
4.9 V
5.0 V
TYPICAL APPLICATION CIRCUIT
3/12
LD3985 SERIES
ELECTRICAL CHARACTERISTICS FOR LD3985 (T = 25°C, V = V
+0.5V, C = 1µF,
I
j
I
O(NOM)
C
= 10nF, I = 1mA, V = 1.4V, unless otherwise specified)
INH
BYP
O
Symbol
Parameter
Test Conditions
Min.
2.5
Typ.
Max.
Unit
V
Operating Input Voltage
Output Voltage
6
2
V
I
V
I
= 1 mA
-2
-3
% of
O
O
V
O(NOM)
3
T = -40 to 125°C
J
∆V
∆V
Line Regulation (Note 1)
Load Regulation
-0.1
-0.19
0.1
0.19
%/V
V = V
+ 0.5 to 6 VT = -40 to 125°C
J
O
O
I
O(NOM)
V
= 4.7 to 5V
O
I
= 1 mA to 150mA (for Flip Chip)
0.0004 0.002
%/mA
O
T = -40 to 125°C
J
0.0025 0.005
1.5
I
= 1 mA to 150mA, T = -40 to 125°C
J
O
(for SOT23-5L)
Output AC Line Regulation V = V + 1 V, I = 150mA,
∆V
mV
PP
O
I
O(NOM)
O
t = t = 30µs
R
O
O
O
O
F
I
Quiescent Current
ON MODE: V = 1.2V
I
I
I
I
= 0
85
µA
Q
INH
150
170
250
= 0
T = -40 to 125°C
J
= 0 to 150mA
= 0 to 150mA
T = -40 to 125°C
J
OFF MODE: V
= 0.4V
0.003
1.5
INH
T = -40 to 125°C
J
V
Dropout Voltage (NOTE 1)
I
I
I
I
I
I
I
I
= 1mA
0.4
mV
DROP
O
O
O
O
O
O
O
O
2
= 1mA
T = -40 to 125°C
J
= 50mA
= 50mA
= 100mA
= 100mA
= 150mA
= 150mA
= 0
20
35
45
70
60
100
600
T = -40 to 125°C
J
T = -40 to 125°C
J
T = -40 to 125°C
J
I
Short Circuit Current
R
mA
dB
SC
L
SVR Supply Voltage Rejection V = V
+0.25V ±
f = 1KHz
60
50
I
O(NOM)
V
= 0.1V, I = 50mA
O
f = 10KHz
RIPPLE
V
< 2.5V,
V = 2.55V
I
O(NOM)
I
Peak Output Current
V
≥ V - 5%
O(NOM)
300
1.2
550
0.4
mA
V
O(PK)
O
V
Inhibit Input Logic Low
Inhibit Input Logic High
Inhibit Input Current
V = 2.5V to 6V
T = -40 to 125°C
J
INH
I
I
V
B
= 0.4V
V = 6V
±1
30
nA
INH
INH
I
eN
Output Noise Voltage
Turn On Time (Note 4)
Thermal Shutdown
Output Capacitor
= 10 Hz to 100 KHz
C
= 1 µF
µV
RMS
W
O
t
C
= 10 nF
BYP
200
160
µs
ON
T
Note 5
°C
SHDN
C
Capacitance (Note 6)
ESR
1
5
22
µF
O
5000
mΩ
Note 1 – For V
Note 2 – For V
< 2V, V = 2.5V
I
O(NOM)
O(NOM)
= 1.25V, V = 2.5V
I
Note 3 – Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This speci-
fication does not apply for input voltages below 2.5V.
Note 4 – Turn-on time is time measured between the enable input just exceeding V
of its nominal value
High Value and the output voltage just reaching 95%
INH
Note 5 – Typical thermal protection hysteresis is 20°C
Note 6 - The minimum capacitor value is 1µF, anyway the LD3985 is still stable if the compensation capacitor has a 30% tolerance in all
temperature range.
4/12
LD3985 SERIES
TYPICAL PERFORMANCE CHARACTERISTICS (T = 25°C, V = V
+0.5V, C = C = 1µF,
I O
j
I
O(NOM)
C
= 10nF, I = 1mA, V
= 1.4V, unless otherwise specified)
BYP
O
INH
Figure 1 : Output Voltage vs Temperature
Figure 2 : Output Voltage vs Temperature
Figure 3 : Output Voltage vs Temperature
Figure 4 : Shutdown Voltage vs Temperature
Figure 5 : Shutdown Voltage vs Temperature
Figure 6 : Line Regulation vs Temperature
5/12
LD3985 SERIES
Figure 7 : Line Regulation vs Temperature
Figure 10 : Load Regulation vs Temperature
Figure 11 : Load Regulation vs Temperature
Figure 12 : Quiescent Current vs Temperature
Figure 8 : Line Regulation vs Temperature
Figure 9 : Load Regulation vs Temperature
6/12
LD3985 SERIES
Figure 13 : Quiescent Current vs Temperature
Figure 16 : Load Transient Response
V = 3.2V, I = 1 to 150mA, Rise-Fall time = 1µsec
I
O
Figure 14 : Quiescent Current vs Temperature
Figure 17 : Line Transient Response
V = 3.8V to 4.4V, T = 25°C, I = 150mA, C = C = 1µF (X7R),
I
J
O
I
O
C
BYP
= 10nF, Rise-Fall time = 1µsec, V = 2.7V
O
Figure 15 : Supply Voltage Rejection vs
Figure 18 : START-UP
Frequency
V = 3.3V, I = 1mA, C = C = 1µF (cer), C
= 10nF, T = 20ns,
r
I
O
I
O
BYP
V
= 2.8V
O
7/12
LD3985 SERIES
Figure 19 : TURN-OFF
V = 3.3V, I = 1mA, C = C = 1µF (cer), C
= 10nF, T = 20ns,
f
I
O
I
O
BYP
V
= 2.8V
O
8/12
LD3985 SERIES
SOT23-5L MECHANICAL DATA
mm.
mils
DIM.
MIN.
0.90
0.00
0.90
0.35
0.09
2.80
1.50
TYP
MAX.
1.45
0.10
1.30
0.50
0.20
3.00
1.75
MIN.
35.4
0.0
TYP.
MAX.
57.1
3.9
A
A1
A2
b
35.4
13.7
3.5
51.2
19.7
7.8
C
D
E
110.2
59.0
118.1
68.8
e
0.95
37.4
H
L
2.60
0.10
3.00
0.60
102.3
3.9
118.1
23.6
.
7049676C
9/12
LD3985 SERIES
Flip-Chip5 MECHANICAL DATA
mm.
mils
TYP.
DIM.
MIN.
0.835
0.21
TYP
0.9
MAX.
0.965
0.29
MIN.
MAX.
37.992
11.417
26.575
14.370
61.811
48.031
21.654
36.063
A
A1
A2
b
32.874
8.268
35.433
0.25
0.65
0.315
1.540
1.19
0.5
9.843
25.591
12.402
60.630
46.850
19.685
34.094
13.583
13.268
0.625
0.265
1.510
1.16
0.675
0.365
1.570
1.22
24.606
10.433
59.449
45.669
17.717
32.126
D
E
e
0.45
0.55
e1
f
0.816
0.866
0.345
0.337
0.916
f1
10/12
LD3985 SERIES
Tape & Reel SOT23-xL MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
180
MIN.
MAX.
7.086
0.519
A
C
12.8
20.2
60
13.0
13.2
0.504
0.795
2.362
0.512
D
N
T
14.4
3.33
3.27
1.47
4.1
0.567
0.131
0.128
0.0.58
0.161
0.161
Ao
Bo
Ko
Po
P
3.13
3.07
1.27
3.9
3.23
3.17
1.37
4.0
0.123
0.120
0.050
0.153
0.153
0.127
0.124
0.054
0.157
0.157
3.9
4.0
4.1
11/12
LD3985 SERIES
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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12/12
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