TPS542941_15 Datasheet, PDF (6/29 Pages) Texas Instruments – 2A/3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

TPS542941
SLVSBI3B – JULY 2012 – REVISED OCTOBER 2013
FUNCTIONAL BLOCK DIAGRAM
PG1
- 16%
PG
Comp
+16%
- 32
UV1
Control logic
VIN1
VIN1
VBST1
0.1 µF
VFB1
Re1f
SS1
Err
Comp
PGND1
SW1
PGND1
Ref_OCL
PGND1
SW1
SW1
EN1
OCP1
ZC1
EN2
EN
Logic
EN Logic
VIN1
GND
Fixed
SoftStart
CH1 Min-off timer
CH2 Min-off timer
SS1
SS2
UV1
UV2
Protection
Logic
UVLO
TSD
5VREG
Ref1
REF
Ref2
UVLO
- 32
UV2
Control logic
VREG5
1.0 µF
VIN2
VIN2
VBST2
0.1 µF
SW2
VFB2
Ref 2
SS2
Err
Comp
PG2
- 16%
PG
Comp
+16%
PGND2
PGND2
OCP2
Ref_OCL
SW2
ZC2
PGND2
SW2
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VO1
VO2
6
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