LM34919C-Q1 Datasheet, PDF (5/29 Pages) Texas Instruments – LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator

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LM34919C-Q1
SNVS831A – SEPTEMBER 2013 – REVISED DECEMBER 2013
PIN DESCRIPTIONS
D1
D2
D3
C1
C2
C3
B1
B2
B3
A1
A2
A3
Figure 2. DSBGA Package Bump View
BST
SW
VIN
VCC
EN
ISEN
SS
PGD
SGND
FB
RTN
RON
Figure 3. DSBGA Package Top View
PIN
NUMBER
A1
A2
A3
PIN NUMBER
(WSON-12)
6
5
7
B1
4
VIN 1
ISEN 2
EN 3
SGND 4
RTN 5
RON 6
WSON-12
Exposed
Pad
12 SW
11 _BST
10 VCC
9 PGD
8 SS
7 FB
Figure 4. WSON Top View
NAME
RON
RTN
FB
SGND
Pin Descriptions
DESCRIPTION
On-time control and shutdown
Circuit Ground
Feedback input from the
regulated output
Sense Ground
APPLICATION INFORMATION
An external resistor from VIN to this pin sets the
buck switch on-time.
Ground for all internal circuitry other than the current
limit detection.
Internally connected to the regulation and
overvoltage comparators. The regulation level is
2.52 V (typ.).
Re-circulating current flows into this pin to the
current sense resistor.
Copyright © 2013, Texas Instruments Incorporated
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