MIC22600 Datasheet, PDF (2/17 Pages) Micrel Semiconductor – 1MHz 6A Integrated Switch Synchronous Buck Regulator

Micrel, Inc.
Ordering Information
Part Number
MIC22600YML
MIC22600
Voltage
Adj.
Junction Temp. Range
–40° to +125°C
Package
24-Pin 4x4 MLF^®
Lead Finish
Pb-Free
Pin Configuration
PVIN
EN
DELAY
RC
POR/PG
PVIN
PVIN
SVIN
SGND
COMP
FB
PVIN
24-Pin 4mm x 4mm MLF (ML)
Pin Description
Pin Number
1, 6, 13, 18
17
2
4
14
15
5
7, 12, 19, 24
16
3
8, 9, 10, 11,
20, 21, 22, 23
EP
Pin Name
PVIN
SVIN
EN
RC
FB
COMP
POR/PG
PGND
SGND
DELAY
SW
Description
Power Supply Voltage (Input): Requires bypass capacitor to GND.
Signal Power Supply Voltage (Input): Requires bypass capacitor to GND.
Enable/Delay (Input): This pin has a 1.2x band gap reference. When the pin is
pulled higher that this the part will start up. Below this voltage the device is in its
low quiescent current mode. The pin has a 1µA current source charging it to VIN.
By adding a capacitor to this pin a delay may easily be generated. The enable
function will not operate with an input voltage lower than the min specified.
Ramp Control: Capacitor to ground from this pin determines slew rate of output
voltage during start-up. This can be used for tracking capability as well as soft
start.
Feedback: Input to the error amplifier, connect to the external resistor divider
network to set the output voltage.
Compensation pin (Input): Place a RC to GND to compensate the device, see
applications section.
Power On Reset (Output): Open-drain output device indicates when the output is
out of regulation and is active after the delay set by the delay pin.
Power Ground (Signal): Ground
Signal Ground (Signal): Ground
Delay (Input): Capacitor to ground sets internal delay timer. Timer delays power-
on reset (POR) output at turn-on and ramp down at turn-off.
Switch (Output): Internal power MOSFET output switches.
GND
Exposed Pad (Power): Must make a full connection to a GND plane for full output
power to be realized.
September 2007
2
M9999-092007-A