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LM5010 Datasheet(PDF) 3 Page - Texas Instruments

Part # LM5010
Description  LM5010 High-Voltage 1-A Step-Down Switching Regulator
PDF  35 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5010 Datasheet(HTML) 3 Page - Texas Instruments

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ExposedPad
1
NC
14
NC
2
SW
13
VIN
3
BST
12
VCC
4
I
SEN
 
11
R
ON
 
/SD
5
S
GND
 
10
SS
6
RTN
9
FB
7
NC
8
NC
ExposedPad
1
SW
10
VIN
2
BST
9
VCC
3
I
SEN
 
8
R
ON
 
/SD
4
S
GND
 
7
SS
5
RTN
6
FB
3
LM5010
www.ti.com
SNVS307G – SEPTEMBER 2004 – REVISED APRIL 2016
Product Folder Links: LM5010
Submit Documentation Feedback
Copyright © 2004–2016, Texas Instruments Incorporated
5 Pin Configuration and Functions
DPR Package
10-Pin WSON
Top View
PWP Package
14-Pin HTSSOP
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
WSON
HTSSOP
BST
2
3
I
Boost pin for bootstrap capacitor: Connect a 0.022-µF capacitor from SW to this pin. The
capacitor is charged from VCC through an internal diode during each OFF-time.
EP
—
—
—
Exposed pad
FB
6
9
I
Feedback input from the regulated output: Internally connected to the regulation and
overvoltage comparators. The regulation level is 2.5 V.
ISEN
3
4
I
Current sense: The recirculating current flows through the internal sense resistor, and out
of this pin to the free-wheeling diode. Current limit is nominally set at 1.25 A.
NC
—
1, 7, 8, 14
—
No connection
RON/SD
8
11
I
ON-time control and shutdown: An external resistor from VIN to this pin sets the buck
switch ON-time. Grounding this pin shuts down the regulator.
RTN
5
6
—
Circuit ground: Ground for all internal circuitry other than the current limit detection.
SGND
4
5
—
Sense ground: Recirculating current flows into this pin to the current sense resistor.
SS
7
10
I
Soft start: An internal 11.5-µA current source charges an external capacitor to 2.5 V,
providing the soft start function.
SW
1
2
O
Switching node: Internally connected to the buck switch source. Connect to the inductor,
free-wheeling diode, and bootstrap capacitor.
VCC
9
12
I
Output from the startup regulator: Nominally regulates at 7 V. An external voltage (7.5 V
to 14 V) can be applied to this pin to reduce internal dissipation. An internal diode
connects VCC to VIN.
VIN
10
13
I
Input supply: Nominal input range is 8 V to 75 V.



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