LD2979Z28TR [STMICROELECTRONICS]
2.85V FIXED POSITIVE LDO REGULATOR, 0.6V DROPOUT, PBCY3, TO-92, 3 PIN;
| 型号： | LD2979Z28TR |
| 厂家： | 
ST |
| 描述： | 2.85V FIXED POSITIVE LDO REGULATOR, 0.6V DROPOUT, PBCY3, TO-92, 3 PIN 输出元件 调节器 |
| 文件： | 总10页 (文件大小：291K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LD2979
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
■
■
VERY LOW DROPOUT VOLTAGE
(0.2V TYP. AT 50mA LOAD)
VERY LOW QUIESCENT CURRENT
(TYP. 500µA AT 50mA LOAD)
OUTPUT CURRENT UP TO 50mA
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
■
■
■
OUTPUT VOLTAGES OF 2.85; 3.0; 3.2; 3.3;
3.8; 5.0V
SOT23-5L
■
■
■
■
■
■
INTERNAL CURRENT AND THERMAL LIMIT
SUPPLY VOLTAGE REJECTION: 63dB (TYP)
ONLY 1µF FOR STABILITY
SELECTION AT 25°C
TEMPERATURE RANGE: -25°C TO 125°C
PACKAGE AVAILABLE: SOT23-5L AND
TO-92
DESCRIPTION
TO-92
The LD2979 series are very Low Drop regulators
available in SOT23-5L and TO-92.
The very low drop-voltage and the very low
quiescent current make them particularly suitable
for low noise, low power applications and in
battery powered systems.
Shutdown Logic Control function is available on
five pin version (TTL compatible). 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.
SCHEMATIC DIAGRAM
February 2003
1/10
LD2979 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
DC Input Voltage
DC Inhibit Input Voltage
Output Current
16
V
V
I
V
V
INH
IN
I
Internally limited
Internally limited
-40 to 150
O
P
Power Dissipation
tot
T
Storage Temperature Range
°C
°C
stg
T
Operating Junction Temperature Range
-25 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.
CONNECTION DIAGRAM (top view)
SOT23-5L
TO-92
PIN DESCRIPTION
SYMBOL
PIN NUMBER
SOT23-5L
NAME AND FUNCTION
TO-92
V
Input Voltage
Ground
1
3
2
IN
GND
INHIBIT
NC
2
3
4
5
Control Switch ON/OFF (*)
Not to be connected
Output Voltage
V
1
OUT
(*) Only for the version in SOT23-5L package: Inhibit pin is not internally pulled-up then it must not be left floating. Connect to a positive
voltage higher than 2V to able the device.
ORDERING CODES
OUTPUT
VOLTAGES
SOT23-5L (T&R)
TO-92
TO-92 (T&R)
TO-92 (Ammo Pack)
LD2979M28TR
LD2979M30TR
LD2979M32TR
LD2979M33TR
LD2979M38TR
LD2979M50TR
LD2979Z28
LD2979Z30
LD2979Z32
LD2979Z33
LD2979Z38
LD2979Z50
LD2979Z28TR
LD2979Z30TR
LD2979Z32TR
LD2979Z33TR
LD2979Z38TR
LD2979Z50TR
LD2979Z28AP
LD2979Z30AP
LD2979Z32AP
LD2979Z33AP
LD2979Z38AP
LD2979Z50AP
2.85 V
3.0 V
3.2 V
3.3 V
3.8 V
5.0 V
2/10
LD2979 SERIES
ELECTRICAL CHARACTERISTICS FOR LD2979 (refer to the test circuits, T = 25°C, V =V
+1V,
a
IN
O(NOM)
(*)
I =1mA, V =2V , C = 1µF) (unless otherwise specified)
O
INH
O
Symbol
Parameter
Test Conditions
= 3.85 V
IN
Min.
2.793
2.736
2.940
2.880
3.136
3.072
3.234
3.168
3.724
3.648
4.9
Typ.
Max.
2.907
2.964
3.060
3.120
3.264
3.328
3.366
3.432
3.876
3.952
5.1
Unit
V
V
V
V
V
V
Output Voltage
Output Voltage
Output Voltage
Output Voltage
Output Voltage
Output Voltage
V
I
2.85
V
O
O
= 1 to 50mA
T = -25 to 125°C
O
a
V
I
= 4 V
3
V
V
IN
= 1 to 50mA
T = -25 to 125°C
O
a
V
I
= 4.2 V
IN
3.2
3.3
3.8
5
O
= 1 to 50mA
T = -25 to 125°C
O
a
V
I
= 4.3 V
IN
V
O
= 1 to 50mA
T = -25 to 125°C
O
a
V
I
= 4.8 V
IN
V
O
= 1 to 50mA
T = -25 to 125°C
O
a
V
I
= 6 V
IN
V
O
4.8
5.2
= 1 to 50mA
T = -25 to 125°C
O
a
I
Output Current Limit
Line Regulation
100
mA
out
∆V
V
= V
+1V to 16V, I = 1mA
0.028 %/V
0.064
O
IN
O(NOM)
O
IN
T = -25 to 125°C
a
I
Quiescent Current (On Mode) I = 0
80
500
0
110
170
µA
d
O
I
I
I
= 0
T = -25 to 125°C
a
O
O
O
= 50mA
700
1300
= 50mA T = -25 to 125°C
a
Quiescent Current (Off Mode)
(*)
µA
V
V
< 0.18 V
< 0.18 V
INH
INH
1
T = -25 to 125°C
a
SVR Supply Voltage Rejection
I
I
I
I
I
I
I
I
I
= 50mA
C
= 10µF f = 120Hz
OUT
63
6
dB
O
O
O
O
O
O
O
O
O
V
Dropout Voltage
= 0
12
18
mV
d
= 0
T = -25 to 125°C
a
= 1mA
= 1mA
= 10mA
30
60
90
T = -25 to 125°C
a
100
200
200
300
400
600
0.18
= 10mA T = -25 to 125°C
a
= 50mA
= 50mA T = -25 to 125°C
a
V
Inhibit Input Logic Low
Inhibit Input Logic High
Inhibit Input Current
V
V
Device Off T = -25 to 125°C (*)
IL
a
V
2
Device On T = -25 to 125°C (*)
IH
a
I
0
5
-1
µA
V
V
= 0 V (*)
= 5V
I
INH
INH
15
T = -25 to 125°C
a
eN
Output Noise Voltage (RMS) BW= 300Hz to 50KHz
C
= 10µF
160
µV
O
(*) Note: Only for types in SOT23-5L
3/10
LD2979 SERIES
TYPICAL CHARACTERISTICS (unless otherwise specified T = 25°C)
a
Figure 1 : Output Voltage vs Temperature
Figure 2 : Output Voltage vs Input Voltage
Figure 3 : Output Voltage vs Input Voltage
Figure 4 : Dropout Voltage vs Output Current
Figure 5 : Dropout Voltage vs Temperature
Figure 6 : Quiescent Current vs Temperature
4/10
LD2979 SERIES
Figure 7 : Short Circuit Current vs Dropout
Figure 10 : Inhibit Voltage vs Temperature
Voltage
Figure 8 : Supply Voltage Rejection vs
Figure 11 : Load Transient Response
Frequency
C
= 10µF (ESR = 1 at 1KHz)
O
Figure 9 : Inhibit Current vs Temperature
Figure 12 : Load Transient Response
C
= 10µF (ESR = 1 at 1KHz)
O
5/10
LD2979 SERIES
Figure 13 : Line Transient Response
C
= 10µF (ESR = 1 at 1KHz)
O
6/10
LD2979 SERIES
SOT23-5L MECHANICAL DATA
mm.
mils
TYP.
DIM.
MIN.
0.90
0.00
0.90
0.35
0.09
2.80
2.60
1.50
TYP
MAX.
1.45
0.15
1.30
0.50
0.20
3.00
3.00
1.75
MIN.
35.4
0.0
MAX.
57.1
5.9
A
A1
A2
b
35.4
13.7
3.5
51.2
19.7
7.8
C
D
110.2
102.3
59.0
118.1
118.1
68.8
E
E1
e
.95
37.4
74.8
0
e1
L
1.9
0.35
0.55
13.7
21.6
7/10
LD2979 SERIES
TO-92 MECHANICA DATA
mm.
mils
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
b
4.32
4.95
170.1
194.9
0.36
4.45
3.30
2.41
1.14
12.7
2.16
0.92
0.41
0.51
4.95
3.94
2.67
1.40
15.49
2.41
1.52
0.56
14.2
175.2
129.9
94.9
20.1
194.9
155.1
105.1
55.1
D
E
e
e1
L
44.9
500.0
85.0
609.8
94.9
R
S1
W
36.2
59.8
16.1
22.0
0102782/C
8/10
LD2979 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
9/10
LD2979 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.
© The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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10/10
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