MIC25400YML TR Micrel Inc, MIC25400YML TR Datasheet - Page 3

• Manufacturer Part Number: MIC25400YML TR
• Description: IC REG PWM SYNC BUCK 2A 24MLF
• Manufacturer: Micrel Inc
• Series: -r

Specifications of MIC25400YML TR

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 1.2MHz
• Duty Cycle: 75%
• Voltage - Supply: 4.5 V ~ 13.2 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 24-VFQFN Exposed Pad, 24-MLF®
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 576-3902-2

Micrel, Inc.
January 2011
Pin Number
EP
13
14
15
16
17
18
19
20
21
22
23
24
Pin Name
EN/DLY2
PGND2
VIND2
VIND1
PVDD
LSD2
BST2
SW2
SW1
GND
PG2
CS2
VIN
Enable/Delay 2 (Input): This pin can be used to disable V
used to disable V
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.
Power Good 2 (Output) Open drain. Device is in the OFF state. i.e.,
high when output is within 90% of regulation
Current Sense 2 (Input) Place a resistor from SW2 to this pin to
program the current limit point from 0.5A to 2.7A
Power Ground 2 (Input)
Low-side Drive 2 (Output): External low-side N-Channel MOSFET
driver. Use 4.5V rated MOSFETs.
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.
Switch Node 2 (Output): Source of internal high-side power MOSFET.
Supply voltage (Input): For the drain of internal high-side power
MOSFET 4.5V to 13.2V.
5V Internal Linear Regulator (Output): PVDD is the external MOSFET
gate drive for LSD1 and LSD2 and an internal supply bus for the IC.
Connect to an external 1µF bypass capacitor. When VIN is <6V, this
regulator operates in drop-out mode. Connect VDD to VIN when VIN
<6V.
Supply voltage (Input): For the internal 5V linear regulator. 4.5V to
13.2V.
Supply voltage (Input): For the drain of internal high-side power
MOSFET 4.5V to 13.2V.
Switch Node 1 (Output): Source of internal high-side power MOSFET.
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.
Pin Description
OUT2
3
, this pin must be pulled down to ground in less
OUT2
. When
M9999-020111-C
MIC25400