L5953 데이터 시트보기 (PDF) - STMicroelectronics
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L5953 Datasheet PDF : 31 Pages
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L5953
Block diagram and electrical specifications
Table 5. Electrical characteristics (continued) (Tamb = 25°C, VDD = 14.4V)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
h
Efficiency
SVR Supply voltage ripple rejection
Oscillator
f = 260kHz; Io = 0.5A
f = 400kHz; Io = 0.5A
ΔVi = 1Vrms;
fripple = 300Hz; Io = 0.4A
90
%
86
%
50
dB
f1
Switching frequency
f2
Switching frequency
Δ--Δ---V-f--i
Voltage stability of switching
frequency
VDD = 8 to 18V
Δ--Δ---T-f--j
Temperature stability of switching
frequency
Tj = -40°C to 85°C
240 260 280 kHz
375 400 425 kHz
Tbd
%
Tbd
%
Sync
VIL
VIH
VOL
VOH
ISLAVE
TW
Low input voltage
High input voltage
Low output voltage
High output voltage
Slave sink current
Output pulse width
ISOURCE=1.5mA
REG1 - 3.3V/5V STBY linear voltage regulator
0.8 V
2
V
0.4 V
4
V
100
μA
300
ns
VSTBY Output voltage
no load; ADJ pin = open
no load; ADJ pin = VSTBY pin
ΔVline
ΔVload
Line regulation
Load regulation
Vdropout VSTCAP - VSTBY
Ilim
Current limit
SVR Supply voltage rejection
no load; 7 < Vdd < 26V
5mA < Io < 250mA
Io = 100mA, Vo = 5V
Io = 100mA, Vo = 3.3V
Out short to GND
ΔVDD = 1Vrms: f = 300Hz
Io = 250mA
REG2 - Linear voltage regulator 1.5V to 3.3V
4.9 5 5.1 V
3.20 3.3 3.4 V
5
50 mV
12 80 mV
0.36 0.5
V
0.47 0.65
300
mA
55
dB
no load; 4.75 ≤ VIN ≤ 16V;
1+ (R5/R6) = 2.588
VLR
Linear regulator output voltage
no load; 3.135 ≤ VIN ≤ 16V;
1+ (R5/R6) = 1.176
3.2 3.3 3.4
V
1.45 1.5 1.55
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