SP34063A Datasheet, PDF (8/10 Pages) Sipex Corporation – 1.5A Buck/Boost/Inverting DC-DC Switching Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
10000
1000
V_CC = 5V
PINS 7 = V_CC
PINS 5 = GND
T_A = 25ºC
toff
100
ton
10
1
0.1
1
10
100
Oscillator Timing Capacitor (nF)
Figure 1. Output Switch On-Off Time vs. Oscillator
Timing Capacitor
1000
100
10
1
0.1
0.1
V_CC = 5V
Pin7 = VCC
Pin5 = GND
T_A = 25ºC
1
10
100
CT, Oscillator Timing Capacitor (nF)
Figure 3. Osillator Frequency vs. Timing Capacitor
1.45
1.44 VCC = 5V
1.43 PINS 1,7,8 = VCC
1.42 ^{PINS 3,5 = GND}
TA = 25ºC
1.41
1.4
1.39
1.38
1.37
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6
Emitter Current (A)
Figure 5. Emitter Follower Configuration Output
Switch Saturation vs. Emitter Current
300
295
290
285
280
275
270
265
260
255
250
-50
0
50
100
150
Temperature
Figure 7. Current Limit Sense Voltage vs. Tempera-
ture
VCC = 5V
CT = 1nF
TA = 25ºC
Figure 2. Timing Capacitor Waveform
3.5
3
2.5
2
1.5
1
0.5
0
0
C_T = 1.0nF
PINS 7 = V_CC
PINS 2 = GND
5 10 15 20 25 30 35 40
Vcc Supply Voltage (V)
Figure 4. Standard Supply Current vs. Supply Voltage
1.2
1
0.8
0.6
0.4
0.2
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Collector Current (A)
Darlington
Forced Beta = 20
VCC = 5V
PINS 7 = V_CC
PINS 2,3,5 = GND
TA = 25ºC
Figure 6. Common Emitter Configuration Output Switch
Saturation vs. Collector Current
Date: 1/11/05
SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator
8
© Copyright 2005 Sipex Corporation