DS6550A Datasheet, PDF (6/16 Pages) Richtek Technology Corporation – Synchronous DC-DC Step-Down Controller with 5V LDO

RT6550A
Parameter
Symbol
Thermal Shutdown
Thermal Shutdown
TSD
Logic Inputs
EN Threshold Voltage
VEN_H
VEN_L
Internal Boost Switch
Internal Boost Switch
On-Resistance
RBOOST
Power MOSFET Drivers
UGATE On-Resistance RUGATE
LGATE On-Resistance RLGATE
Dead-Time
tD
Test Conditions
SMPS On
SMPS Off
LDO5 to BOOT
High State, VBOOT  VUGATE = 0.25V,
VBOOT  VPHASE = 5V
Low State, VUGATE  VPAHSE = 0.25V,
VBOOT  VPHASE = 5V
High State, VLDO5  VLGATE = 0.25V,
VLDO5 = 5V
Low State, VLGATE  GND = 0.25V
LGATE Rising
UGATE Rising
Min Typ Max Unit
-- 150 --
°C
1.6 --
--
--
--
0.4
V
-- 80 --

--
3
--

--
2
--
--
3
--

--
1
--
-- 20 --
--
30
--
ns
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured under natural convection (still air) at TA = 25°C with the component mounted on a high effective-
thermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard. θJC is measured at the
exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS6550A-00 September 2016