THV3056 Datasheet, PDF (6/32 Pages) THine Electronics, Inc. – 3ch Buck/Boost 2ch CP 1ch HVLDO 1ch LVLDO Controller

THV3056_Rev.2.00_E
Pin# Symbol
Function
Description
37
OUT_H2 ch-2 High side drive output Ch-2 High side NMOS transistor drive for synchronous rectifier.
36
BST2
ch-2 High side capacitor
connection pin
Ch-2 power supply for High side drive output.
53
OUT_VGH
VGH
(charge pump +)output
VGH drive output for positive voltage charge pump. V_VGH is used as
power supply. In PFM mode, this pin can be used as NMOS gate drive.
57
V_VGL VGL output voltage supply VGL output voltage supply.
58
V_VGH VGH output voltage supply VGH output voltage supply.
49
INV_HLDO
HVLDO amplifier invert-
ing input
HVLDO inverting input. The voltage on this pin is 1.2V in the nor-
mal operation.
50 OUT_HLDO HVLDO output
HVLDO output. Connect to an external capacitor(Typ:2.2uF).
51
VO_1IN HVLDO voltage supply HVLDO voltage supply.
34 SS_LLDO LVLDO soft start
Soft start pin for LVLDO.
33 OUT_LLDO LVLDO output
LVLDO output. Connect to an external capacitor(Typ:10uF).
35
V_LLDO LVLDO voltage supply
LVLDO voltage supply.
3
VO_1SW
ch-1 control output for
switch
Ch-1 gate control output for the external switch. The voltage is in pro-
portion to the voltage on SS_SW pin.
1
OUT1 ch-1 output
Ch-1 drive output for the external FET of Boost. 0~5V
6
VREG5IN Voltage supply for control Connect to VREG5 pin.
7
VREG5 5V regulator output
Power supply for Low voltage output.
Connect this pin with an external capacitor (Typ:4.7uF).
8 SYSUVLO System UVLO input
SYSUVLO pin shuts down the IC, when the power supply voltage is
lower than the predetermined voltage. Vin voltage divided by resistance
is applied. The minimum operation voltage can be set optionally by
changing the resistance value. If not in use, connect this pin to VREF or
VREG5 pin.
63
VCC
Power supply for control Power supply for control.
39
OUT_L2
ch-2 Low side driver out-
put
Ch-2 Low side NMOS transistor drive for synchronous rectifier.
Available even without Low side NMOS transistor. But in this case, set
the load current of ch-2 at more than 10mA.
38
LL2
ch-2 inductor node con-
nection pin
Ch-2 inductor node connection pin.
61
OUT3
ch-3 output
Ch-3 drive output for an external FET of Buck(push-pull).
0 ～ V_OUT3
52
55
NC
NC
60
No connection. Leave open.
65 GNDEXP back side
GNDEXP should be soldered to GND to improve the thermal character-
istics.
Copyright©2010 THine Electronics, Inc.
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THine Electronics, Inc.