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参数资料
| 型号： | L5953 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.2 A SWITCHING REGULATOR, 425 kHz SWITCHING FREQ-MAX, PDSO36 |
| 封装： | LEAD FREE, SOP-36 |
| 文件页数： | 30/31页 |
| 文件大小： | 420K |
| 代理商： | L5953 |
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Product(s)
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Product(s)
Block diagram and electrical specifications
L5953
21
N.C.
Not connected
22
GND
Ground
23
VSW
Source of the external MOS
24
GATEIN
Gate of the internal MOS
25
GATEOUT
Switching output for power mos gate
26
STRAP
Bootstrap
27
SYNC
Synchronization
28
VLR
REG2 linear voltage regulator output
29
VIN
REG2 linear voltage regulator input
30
FBLR
REG2 linear voltage regulator feedback
31
COMP
PWM compensation
32
FB
PWM feedback
33
STCAP
ST-CAP
34
VSPI
Supply voltage for SPI I/O
35
VSTBY
REG1 stand-by linear voltage regulator output
36
ADJ
3.3V/5V REG1 voltage select
Table 4.
PIN function (continued)
Pin number
Pin name
Function
Table 5.
Electrical characteristics (Tamb = 25°C, VDD = 14.4V)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
IQ,STBY
Quiescent current with regulators
and high-side drivers off
W1, W2, RES, IRQ, not active;
REG2, HSD1, HSD2, PWM off;
S, C, D fixed at high/low logic
level
100
μA
Tsd
Thermal shutdown junction
temperature
150
°C
SMPS.PWM (Tamb = 25°C, VDD = 14.4V, Vo = 5V; unless otherwise specified.)
Vo,min
Minimum output voltage
Io = 200mA
2.4
2.5
2.6
V
Vo,max
Maximum output voltage
Io = 200mA
9.6
10
10.4
V
Vref,PWM
Voltage reference
1.275
V
Vi
Input voltage range
Vo = 5V; Io = 0.5A
6
18
V
ΔV
o
Line regulation
Io = 0.5A
100
mV
ΔV
o
Load regulation
Vo = 5V; Io = 0.2A to 0.5A
50
mV
Vd
Dropout voltage between Pin 19
and Pin 23
Io = 0.5A, Vo = 5V
0.5
V
Io = 1A, Vo = 5V
1
V
ILim
Current limit
1.2
A
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