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| MIC22705 Datasheet, PDF (13/28 Pages) Micrel Semiconductor – 1MHz, 7A Integrated Switch High-Efficiency Synchronous Buck Regulator | |||
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Micrel, Inc.
MIC22705
Functional Diagram
MIC22705
1 µA
CURRENT
LIMIT
UVLO
EN
EN/DLY
1.0nF
THERMAL
SHUTDOWN
CONTROL
LOGIC
CLOCK
COMP
COMP
EA
120k
20k
39pF
240k 50pF 120k
VDD
DELAY
1 µA
OPEN
VIN
1 µA
47.5k
PG
PG
SVIN
40mV
HSD
PVIN
LSD
PVIN
22µF
x4
VIN
2.9V to 5.5V
1.0µH
SW
PGND
FB
47µF
x2
VOUT
1.8V/7A
R1
1.10k
R2
698
VREF
0.7V
SVIN
1 µA
RC
90%
VREF
1 µA
1.0nF
SGND
Figure 1. MIC22705 Functional Diagram
December 2010
13
M9999-121710-A
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