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MIC24420 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC24420
Description  2.5A Dual Output PWM Synchronous Buck Regulator IC
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC24420 Datasheet(HTML) 3 Page - Micrel Semiconductor

 
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Micrel, Inc.
MIC24420/MIC24421
June 2012
3
M9999-062012-C
Pin Description (Continued)
Pin Number
Pin Name
Pin Description
13
EN/DLY2
Enable/Delay 2 (Input): This pin can be used to disable VOUT2. When used to disable VOUT2, this
pin must be pulled down to ground in less than 1µs for proper operation. It is also used for soft-
start of the output. Soft start capacitor range is 4.7nF to 22nF. See Functional Description
section for additional information.
14
PG2
Power Good 2 (Output) Open drain. Device is in the OFF state. i.e. high when output is within
90% of regulation
15
CS2
Current Sense 2 (Input) Place a resistor from SW2 to this pin to program the current limit point
from 0.5A to 2.7A
16
PGND2
Power Ground 2 (Input)
17
LSD2
Low-side Drive 2 (Output): External low-side N-Channel MOSFET driver. Use 4.5V rated
MOSFETs.
18
BST2
Boost 2 (Input): Provides voltage for high-side internal MOSFET for Channel 2. Connect a
0.01µF capacitor from SW2 to BST2 pin and a diode to PVDD.
19
SW2
Switch Node 2 (Output): Source of internal high-side power MOSFET.
20
VIND2
Supply voltage (Input): For the drain of internal high-side power MOSFET 4.5V to 13.2V.
21
PVDD
5V VDD input (input): Power connection to the internal MOSFET drivers. Connect to AVDD
through an RC filter
22
VIN
Supply voltage (Input): For the internal 5V linear regulator. 4.5V to 13.2V.
23
VIND1
Supply voltage (Input): For the drain of internal high-side power MOSFET 4.5V to 13.2V.
24
SW1
Switch Node 1 (Output): Source of internal high-side power MOSFET.
EP
ePad
Exposed thermal pad for package only. Connect to ground. Must make a full connection to the
ground plane to maximize thermal performance of the package.


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