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LM25011AMYE Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce LM25011AMYE
Description  LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 42-V 2-A Constant On-Time Switching Regulator With Adjustable Current Limit
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM25011AMYE Fiches technique(HTML) 3 Page - Texas Instruments

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background image
SW
BST
FB
CS
CSG
RT
VIN
PGD
SGND
SS
Exposed Pad on Bottom
Connect to Ground
1
2
3
4
5
10
9
8
7
6
LM25011, LM25011-Q1, LM25011A, LM25011A-Q1
www.ti.com
SNVS617H – APRIL 2009 – REVISED NOVEMBER 2014
5 Pin Configurations and Functions
10-Pin
HVSSOP Package
Top View
Pin Functions
PIN
I/O
DESCRIPTION
APPLICATION INFORMATION
NUMBER
NAME
1
VIN
I
Input supply voltage
Operating input range is 6 V to 42 V. Transient capability is 45 V.
A low ESR capacitor must be placed as close as possible to the
VIN and SGND pins.
2
RT
I
On-time Control
An external resistor from VIN to this pin sets the buck switch on-
time and the switching frequency.
3
PGD
Power Good
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 7 V is required.
4
SS
I
Soft-Start
An internal current source charges an external capacitor to
provide the soft-start function.
5
SGND
Signal Ground
Ground for all internal circuitry other than the current limit sense
circuit.
6
FB
I
Feedback
Internally connected to the regulation comparator. The regulation
level is 2.51 V.
7
CSG
Current Sense Ground
Ground connection for the current limit sensing circuit. Connect to
ground and to the current sense resistor.
8
CS
I
Current sense
Connect to the current sense resistor and the anode of the free-
wheeling diode.
9
SW
O
Switching Node
Internally connected to the buck switch source. Connect to the
external inductor, cathode of the free-wheeling diode, and
bootstrap capacitor.
10
BST
I
Bootstrap capacitor connection of Connect a 0.1-µF capacitor from SW to this pin. The capacitor is
the buck switch gate driver.
charged during the buck switch off-time via an internal diode.
-
EP
Exposed Pad
Exposed pad on the underside of the package. This pad should
be soldered to the PC board ground plane to aid in heat
dissipation.
Copyright © 2009–2014, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Links: LM25011 LM25011-Q1 LM25011A LM25011A-Q1


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