LM25011MY/NOPB National Semiconductor, LM25011MY/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM25011MY/NOPB
• Description: IC BUCK ADJ 2A 10MSOP
• Manufacturer: National Semiconductor
• Type: Step-Down (Buck)r

Specifications of LM25011MY/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.51 ~ 40 V
• Current - Output: 2A
• Frequency - Switching: Up to 2MHz
• Voltage - Input: 6 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
• Power - Output: 155mW
• Primary Input Voltage: 42V
• No. Of Outputs: 1
• Output Voltage: 40V
• Output Current: 2A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 3 - 168 Hours
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM25011MYTR

Pin No.
Pin Descriptions
10
1
2
3
4
5
6
7
8
9
SGND
Name
PGD
CSG
BST
VIN
SW
CS
RT
SS
FB
Bootstrap capacitor connection of the
buck switch gate driver.
Current Sense Ground
Input supply voltage
On-time Control
Switching Node
Signal Ground
Current sense
Description
Power Good
Feedback
Soft-Start
Application Information
Operating input range is 6V to 42V. Transient capability is 45V. A low ESR
capacitor must be placed as close as possible to the VIN and SGND pins.
An external resistor from VIN to this pin sets the buck switch on-time, and
the switching frequency.
Logic output indicates when the voltage at the FB pin has increased to
above 95% of the internal reference voltage. Hysteresis is provided. An
external pull-up resistor to a voltage less than 7V is required.
An internal current source charges an external capacitor to provide the soft-
start function.
Ground for all internal circuitry other than the current limit sense circuit.
Internally connected to the regulation comparator. The regulation level is
2.51V.
Ground connection for the current limit sensing circuit. Connect to ground
and to the current sense resistor.
Connect to the current sense resistor and the anode of the free-wheeling
diode.
Internally connected to the buck switch source. Connect to the external
inductor, cathode of the free-wheeling diode, and bootstrap capacitor.
Connect a 0.1 µF capacitor from SW to this pin. The capacitor is charged
during the buck switch off-time via an internal diode.
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