SA57254-30GW Datasheet, PDF (4/18 Pages) NXP Semiconductors – CMOS switching regulator (PWM controlled)

Philips Semiconductors
CMOS switching regulator (PWM controlled)
Product data
SA57254-XX
ELECTRICAL CHARACTERISTICS
T_amb = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
V_IN
V_ST1
V_ST2
input voltage
operating start voltage
oscillator start voltage
V_HLD
operation hold voltage
I_SS1
consumption current 1
CONDITIONS
I_OUT = 1.0 mA
I_OUT = 1.0 mA
V_OUT = output voltage × 0.95
I_SS2
consumption current 2
V_OUT = output voltage + 0.5 V
R_DS(ON)
internal switch-on resistance
V_SW = 0.4 V
I_SWO
switching transistor leak
current
∆V_OUT2
load ripple voltage
∆V_OUT/∆T_amb output voltage temperature
coefficient
f_OSC
MaxDuty
oscillator frequency
maximum duty ratio
t_SS
soft start time
E_FFI
efficiency
V_OUT = V_SW = 9 V
I_OUT = 10 mA ≈ I_OUT (following) × 1.25
–40 °C ≤ T_amb ≤ +85 °C
V_OUT = output voltage × 0.95
V_OUT = output voltage × 0.95
I_OUT = 1.0 mA
Part #
–
–
–
–
-20
-25
-28
-30
-33
-36
-50
-20
-25
-28
-30
-33
-36
-50
-20
-25
-28
-30
-33
-36
-50
–
–
–
–
–
–
-20
-25
-28
-30
-33
-36
-50
MIN.
–
–
–
0.7
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
42.5
75
3.0
–
–
–
–
–
–
–
TYP.
–
–
–
–
11.6
14.3
16.1
17.2
19.1
22.4
38.5
3.1
3.2
3.2
3.2
3.3
3.3
3.5
5.6
4.1
4.1
3.2
3.2
3.2
2.2
–
30
±50
50
83
6.0
75
79
79
83
83
83
87
MAX.
9.0
0.9
0.8
–
19.4
23.9
26.8
28.7
31.8
37.3
64.1
6.2
6.3
6.4
6.4
6.5
6.5
6.9
8.9
6.5
6.5
5.1
5.1
5.1
3.5
1.0
UNIT
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
Ω
Ω
Ω
Ω
Ω
Ω
Ω
µA
60
mV
–
ppm/°C
57.5
kHz
90
%
12
ms
–
%
–
%
–
%
–
%
–
%
–
%
–
%
2003 Nov 11
4