L5953 데이터 시트보기 (PDF) - STMicroelectronics
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L5953 Datasheet PDF : 31 Pages
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Block diagram and electrical specifications
Table 4. PIN function (continued)
Pin number
Pin name
Function
21
N.C.
Not connected
22
GND
Ground
23
VSW
24
GATEIN
Source of the external MOS
Gate of the internal MOS
25
GATEOUT
Switching output for power mos gate
26
STRAP
Bootstrap
27
SYNC
Synchronization
28
VLR
29
VIN
REG2 linear voltage regulator output
REG2 linear voltage regulator input
30
FBLR
REG2 linear voltage regulator feedback
31
COMP
PWM compensation
32
FB
PWM feedback
33
STCAP
34
VSPI
ST-CAP
Supply voltage for SPI I/O
35
VSTBY
REG1 stand-by linear voltage regulator output
36
ADJ
3.3V/5V REG1 voltage select
L5953
Table 5. Electrical characteristics (Tamb = 25°C, VDD = 14.4V)
Symbol
Parameter
Test condition
IQ,STBY
Tsd
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
Thermal shutdown junction
temperature
SMPS.PWM (Tamb = 25°C, VDD = 14.4V, Vo = 5V; unless otherwise specified.)
Vo,min
Vo,max
Vref,PWM
Minimum output voltage
Maximum output voltage
Voltage reference
Io = 200mA
Io = 200mA
Vi
Input voltage range
Vo = 5V; Io = 0.5A
ΔVo
Line regulation
Io = 0.5A
ΔVo
Load regulation
Vo = 5V; Io = 0.2A to 0.5A
Vd
Dropout voltage between Pin 19
and Pin 23
Io = 0.5A, Vo = 5V
Io = 1A, Vo = 5V
ILim
Current limit
Min. Typ. Max. Unit
100 μA
150
°C
2.4 2.5 2.6 V
9.6 10 10.4 V
1.275
V
6
18 V
100 mV
50 mV
0.5 V
1
V
1.2
A
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