THV3011_Rev.1.00_E
Pin Description
Pin
1
Symbol
AVCC
Function
Power supply for control block.
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.
2
PSI
3
4
BOOT
LL
Bootstrap pin. Bias input for high side power MOSFET driver.
Switching output. Connect to the inductor node.
Oscillation frequency setting pin. Connect to REG for 360kHz, leave it
open for 500kHz.
5
6
FSET
HG
High side gate drive output.
Shut-off delay time setting. Connect a capacitor to the GND.
Low gate drive output.
7
8
9
OFFDELAY
LG
GND
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.
10
11
PGOOD
CSN
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.
12
CSP
13
14
FB
SS
Output voltage feedback.
Soft start time setting pin. Connect a capacitor to the GND.
Enable pin. Active at high level. CTL pin can be set at the voltage
higher than AVCC.
15
16
CTL
REG
5V regulator output. Internal power supply for Bootstrap and control
circuit. Connect a capacitor to the GND.
5/12
THine Electronics, Inc.
Copyright©2009 THine Electronics, Inc.
THINE [ THINE ELECTRONICS, INC. ]
