MIC2182 Micrel Semiconductor, MIC2182 Datasheet - Page 9

• Manufacturer Part Number: MIC2182
• Description: High-Efficiency Synchronous Buck Controller Final Information
• Manufacturer: Micrel Semiconductor

June 2000
MIC2182
C
R
COMP
EN/UVLO
COMP
COMP
SYNC
PWM
SS
6
1
2
5
3
MIC2182-x.x
RESET
Oscillator
PWM
Control
Logic
CORRECTIVE
RAMP
PWM Mode
to Skip
Mode
Skip-Mode
Current
Limit
Low
Comp
Hysteresis
Comp
Figure 2b. Fixed Output Voltage Versions
Current
Limit
100k
Error
Amp
–2%V
0.024V
0.07V
Reference
G
BG
m
= 0.2 10
9
V
V
-3
Current
Sense
Amp
A
DD
IN
V
= 2
R1*
50k
R2
VDD
11
VIN
10
VBST
14
HSD
16
VSW
15
LSD
13
PGND
12
CSH
8
VOUT
9
SGND
4
VREF
7
V
IN
* 82.5k for 3.3V Output
Q2
Q1
150k for 5V Output
C
D2
C
D1
IN
BST
L1
4.7 F
R
CS
V
C
OUT
OUT
MIC2182
Micrel