ncp1522b ON Semiconductor, ncp1522b Datasheet - Page 2

• Manufacturer Part Number: ncp1522b
• Description: 3 Mhz, 600 Ma Step-down Dc-dc Converter
• Manufacturer: ON Semiconductor

V
Enable
battery
4.7 mF
GND
VIN
EN
1
2
3
SHUTDOWN
& THERMAL
CONTROL
100
95
90
85
80
75
70
65
60
55
50
LOGIC
0
CONTROL
PWM/PFM
Figure 3. Efficiency vs. Output Current
100
Figure 4. Simplified Block Diagram
I
REFERENCE
OUT,
VOLTAGE
Q1
200
I
LIMIT
http://onsemi.com
OUTPUT CURRENT (mA)
NCP1522B
Q2
300
2
400
V
V
T
A
OUT
IN
LX
FB
= 25°C
5
4
= 4.2 V
500
= 3.3 V
600
2.2 mH
4.7 mF
R1
R2
18 pF