SA57254-30GW Datasheet, PDF (5/18 Pages) NXP Semiconductors – CMOS switching regulator (PWM controlled)

Philips Semiconductors
CMOS switching regulator (PWM controlled)
Product data
SA57254-XX
TYPICAL PERFORMANCE CURVES
50
V_OUT = OUTPUT VOLTAGE × 0.95
40
30
I_SS1
(µA)
20
10
0
–40
–20
0
20
40
60
80
100
T_amb 〈°C)
SL01456
Figure 3. Supply current 1 versus temperature.
70
V_OUT = OUTPUT VOLTAGE × 0.95
65
60
55
f_OSC
(kHz)
50
45
40
35
30
–40
–20
0
20
40
60
80
100
T_amb 〈°C)
SL01458
Figure 5. Oscillator frequency versus temperature.
250
T_amb = 25 °C
V_CONT = 0.4 V
200
150
I_SW
(mA)
100
50
0
0
1
2
3
4
5
V_OUT (V)
SL01462
Figure 7. Typical switch current versus V_OUT.
5
V_OUT = OUTPUT VOLTAGE + 0.5 V
4
3
I_SS2
(µA)
2
1
0
–40
–20
0
20
40
60
80
100
T_amb 〈°C)
SL01457
Figure 4. Supply current 2 versus temperature.
50
T_amb = 25 °C
40
30
I_{SS1, 2}
(µA)
20
10
0
0
2
4
6
8
10
V_OUT (V)
SL01459
Figure 6. Supply current 1, 2 versus V_OUT.
70
T_amb = 25 °C
60
f_OSC (kHz)
50
40
30
0
1
2
3
4
5
V_OUT (V)
SL01471
Figure 8. Oscillator frequency versus V_OUT.
2003 Nov 11
5