RT6576E
Pin No.
9
10
11
12
13
14
15
16
17
Pin Name
BOOT2
UGATE2
LGATE2
VIN
LDO5
BYP1
LGATE1
UGATE1
BOOT1
Pin Function
Bootstrap Supply for Channel 2 High-Side Gate Driver. Connect to an external
capacitor according to the typical application circuits.
High-Side Gate Driver Output for Channel 2. UGATE2 swings between PHASE2
and BOOT2.
Low-Side Gate Driver Output for Channel 2. LGATE2 swings between GND and
LDO5.
Power Input for 5V and 3.3V LDO Regulators and Buck Controllers.
5V Linear Regulator Output. LDO5 is also the supply voltage for the low-side
MOSFET and analog supply voltage for the device.
Switch-over Source Voltage Input for LDO5.
Low-Side Gate Driver Output for Channel 1. LGATE1 swings between GND and
LDO5.
High-Side Gate Driver Output for Channel 1. UGATE1 swings between PHASE1
and BOOT1.
Bootstrap Supply for Channel 1 High-Side Gate Driver. Connect to an external
capacitor according to the typical application circuits.
Switch Node of Channel 1 MOSFETs. PHASE1 is the internal lower supply rail for
the UGATE1 high-side gate driver. PHASE1 is also the current sense input for the
Channel 1.
Oscillator Output for Charge Pump.
Enable Control Input for Channel 1.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
18
19
20
PHASE1
VCLK
EN1
21
GND
(Exposed Pad)
Functional Block Diagram
BOOT1
UGATE1
PHASE1
LDO5
Channel 1
Buck
Controller
Channel 2
Buck
Controller
LDO5
BOOT2
UGATE2
PHASE2
LGATE1
FB1
CS1
BYP1
VCLK
LGATE2
FB2
CS2
PGOOD
OSC
GND
SW5 Threshold
BYP1
Power-On
Sequence
Clear Fault Latch
EN1
EN2
LDO5
LDO5
VIN
REF
LDO3
BYP1
LDO3
Copyright
©
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6576E-00 May 2016
www.richtek.com
3
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
