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SA57254-30GW Datasheet(PDF) 4 Page - NXP Semiconductors

Part # SA57254-30GW
Description  CMOS switching regulator (PWM controlled)
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SA57254-30GW Datasheet(HTML) 4 Page - NXP Semiconductors

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Philips Semiconductors
Product data
SA57254-XX
CMOS switching regulator (PWM controlled)
2003 Nov 11
4
ELECTRICAL CHARACTERISTICS
Tamb = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
Part #
MIN.
TYP.
MAX.
UNIT
VIN
input voltage
9.0
V
VST1
operating start voltage
IOUT = 1.0 mA
0.9
V
VST2
oscillator start voltage
0.8
V
VHLD
operation hold voltage
IOUT = 1.0 mA
0.7
V
ISS1
consumption current 1
VOUT = output voltage × 0.95
-20
11.6
19.4
µA
-25
14.3
23.9
µA
-28
16.1
26.8
µA
-30
17.2
28.7
µA
-33
19.1
31.8
µA
-36
22.4
37.3
µA
-50
38.5
64.1
µA
ISS2
consumption current 2
VOUT = output voltage + 0.5 V
-20
3.1
6.2
µA
-25
3.2
6.3
µA
-28
3.2
6.4
µA
-30
3.2
6.4
µA
-33
3.3
6.5
µA
-36
3.3
6.5
µA
-50
3.5
6.9
µA
RDS(ON)
internal switch-on resistance
VSW = 0.4 V
-20
5.6
8.9
()
-25
4.1
6.5
-28
4.1
6.5
-30
3.2
5.1
-33
3.2
5.1
-36
3.2
5.1
-50
2.2
3.5
ISWO
switching transistor leak
current
VOUT = VSW = 9 V
1.0
µA
∆VOUT2
load ripple voltage
IOUT = 10 mA ≈ IOUT (following) × 1.25
30
60
mV
∆VOUT/∆Tamb output voltage temperature
coefficient
–40
°C ≤ Tamb ≤ +85 °C
±50
ppm/
°C
fOSC
oscillator frequency
VOUT = output voltage × 0.95
42.5
50
57.5
kHz
MaxDuty
maximum duty ratio
VOUT = output voltage × 0.95
75
83
90
%
tSS
soft start time
IOUT = 1.0 mA
3.0
6.0
12
ms
EFFI
efficiency
-20
75
%
-25
79
%
-28
79
%
-30
83
%
-33
83
%
-36
83
%
-50
87
%


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