MIC2179 Datasheet, PDF (9/16 Pages) Micrel Semiconductor – 1.5A Synchronous Buck Regulator

MIC2179
PWM-Mode Functional Diagram
V_IN
4.5V to 16.5V
Micrel
C_IN
VIN _{16 17}
I_SENSE
Amp.
110mΩ
P-channel
110mΩ
N-channel
Stop
SYNC
13
200kHz
Oscillator
Corrective
Ramp
Reset
Pulse
COMP
C_C
R_C ⁸
R
Q
S
PWM
Comp.
Error
Amp.
V_REF 1.245V
MIC2179 [Adjustable] PWM-Mode Signal Path
SGND ^{9 10 11 12}
R1
V_OUT
1.245
R2
1
SW
3
PGND
1
2
19
20
L1
I_L1
D
C_OUT
V_OUT
R1
FB
7
R2
V_SW
Reset
Pulse
I_LOAD
I_L1
∆I_L1
Error Amp.
Output
I_SENSE
June 1998
9
MIC2179