ua78s40 ETC-unknow, ua78s40 Datasheet - Page 4

• Manufacturer Part Number: ua78s40
• Description: Switching Regulator Subsystem
• Manufacturer: ETC-unknow

4
1000
100
1.0
1.6
1.5
1.4
1.3
1.2
1.1
1.0
10
0.1
0
V CC = 5.0 V
Pins 14, 15, 16 = V CC
Pins 10, 12 = Gnd
Pin 9 = V ref
V CC = 5.0 V
I pk(sense) = V CC
Pin 10 = Gnd
Pin 9 = V ref
Figure 3. Emitter–Follower Configuration
0.2
Figure 1. Output Switch On/Off Time
versus Oscillator Timing Capacitor
Output Switch Saturation Voltage
C T , OSCILLATOR TIMING CAPACITOR (nF)
0.4
versus Emitter Current
I E , EMITTER CURRENT (A)
1.0
0.6
t on
0.8
1.0
10
t off
1.2
1.4
100
A78S40
3.2
2.4
1.6
0.8
1.2
1.0
0.6
0.4
0.2
0.8
0
0
0
0
V CC = 5.0 V
Pin 14 = V CC
Pins 3, 10, 12 = Gnd
Pin 9 = V ref
C T = 0.001 F
I pk(sense) = V CC
Pin 3 = Gnd
Figure 4. Common–Emitter Configuration
5.0
0.2
Figure 2. Standby Supply Current
Output Switch Saturation Voltage
MOTOROLA ANALOG IC DEVICE DATA
10
versus Collector Current
0.4
versus Supply Voltage
I C , COLLECTOR CURRENT (A)
V CC , SUPPLY VOLTAGE (V)
15
Forced Beta = 20
0.6
Darlington Connection
20
0.8
25
1.0
30
1.2
35
1.4
40