MIC2177 Datasheet, PDF (9/16 Pages) Micrel Semiconductor – 2.5A Synchronous Buck Regulator

MIC2177
PWM-Mode Functional Diagram
V_IN
4.5V to 16.5V
C_IN
VIN 1 2 9
Micrel
I_SENSE
Amp.
100mΩ
P-channel
100mΩ
N-channel
Stop
SYNC
18
200kHz
Oscillator
Corrective
Ramp
Reset
Pulse
COMP
C_C
R_C ¹³
R
Q
S
PWM
Comp.
Error
Amp.
V_REF 1.245V
MIC2177 [Adjustable] PWM-Mode Signal Path
SGND ^{14 15 16 17}
V_OUT
R1
1.245
R2
SW
3
L1
8
I_L1
D
C_OUT
PGND
4
5
6
7
1
V_OUT
R1
FB
12
R2
V_SW
Reset
Pulse
I_LOAD
I_L1
∆I_L1
Error Amp.
Output
I_SENSE
April 1999
9
MIC2177