THV3012_Rev.1.00_E
Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
Symbol
VIN
PSI
BOOT
LL
FSET
HG
OFFDELAY
LG
GND
PGOOD
CSN
Function
Input voltage detection pin. Connect to the input power supply.
Power standby Indication. Applying low level voltage to this pin, IC
goes into the light load mode. Applying high level, IC operates in the
synchronous mode.
Bootstrap pin. Bias input for high side power MOSFET driver.
Switching output. Connect to the inductor node.
Oscillation frequency setting pin. Connect to VCC for 360kHz, leave it
open for 500kHz.
High side gate drive output.
Shut-off delay time setting. Connect a capacitor to the GND.
Low gate drive output.
Ground.
Power good output. PGOOD outputs High level, when CTL pin is High
level and output voltage is 82.4% or more of set voltage.
Current sense negative input.
Current sense positive input. When 60mV(typ) or more of voltage dif-
ference is detected between CSP pin and CSN pin, the voltage on LL
pin falls down to the low level. When the voltage on CTL pin is low
level, the transistor turns to the On state and pull-down the output volt-
age.
Output voltage feedback.
Soft start time setting pin. Connect a capacitor to the GND.
Enable pin. Active at high level. CTL pin is able to be set at the voltage
higher than VIN.
Power supply for control block. Connect to power supply of 4.5 ~ 5.5V.
Connect a capacitor to the GND.
12
CSP
13
14
15
16
FB
SS
CTL
VCC
Copyright©2009 THine Electronics, Inc.
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THine Electronics, Inc.
THINE [ THINE ELECTRONICS, INC. ]
