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LM5010SD Datasheet(PDF) 2 Page - Texas Instruments

Part # LM5010SD
Description  High-Voltage 1-A Step-Down Switching Regulator
PDF  26 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM5010SD Datasheet(HTML) 2 Page - Texas Instruments

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Top View
14 Lead TSSOP
SW
BST
VCC
VIN
NC
NC
NC
NC
RTN
FB
SS
11
10
9
5
4
3
2
1
6
7
8
12
13
14
R
ON /SD
I
SEN
S GND
SW
BST
RTN
VCC
FB
SS
VIN
Top View
10 Lead LLP
10
9
8
7
6
5
4
3
2
1
/SD
R ON
S GND
ISEN
LM5010
SNVS307E – SEPTEMBER 2004 – REVISED FEBRUARY 2005
www.ti.com
Connection Diagram
Pin Functions
Table 1. Pin Description
PIN NUMBER
NAME
DESCRIPTION
APPLICATION INFORMATION
LLP-10
TSSOP-
14
1
2
SW
Switching Node
Internally connected to the buck switch source. Connect to the
inductor, free-wheeling diode, and bootstrap capacitor.
2
3
BST
Boost pin for bootstrap
Connect a 0.022 µF capacitor from SW to this pin. The capacitor
capacitor
is charged from VCC via an internal diode during each off-time.
3
4
ISEN
Current sense
The re-circulating current flows through the internal sense
resistor, and out of this pin to the free-wheeling diode. Current
limit is nominally set at 1.25A.
4
5
SGND
Sense Ground
Re-circulating current flows into this pin to the current sense
resistor.
5
6
RTN
Circuit Ground
Ground for all internal circuitry other than the current limit
detection.
6
9
FB
Feedback input from the
Internally connected to the regulation and over-voltage
regulated output
comparators. The regulation level is 2.5V.
7
10
SS
Softstart
An internal 11.5 µA current source charges an external capacitor
to 2.5V, providing the soft start function.
8
11
RON/SD
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.
9
12
VCC
Output from the startup
Nominally regulates at 7.0V. An external voltage (7.5V-14V) can
regulator
be applied to this pin to reduce internal dissipation. An internal
diode connects VCC to VIN.
10
13
VIN
Input supply voltage
Nominal input range is 8.0V to 75V.
1, 7, 8,
NC
No connection
No internal connection.
14
2
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Copyright © 2004–2005, Texas Instruments Incorporated
Product Folder Links: LM5010



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