RT7264A Datasheet, PDF (6/17 Pages) Richtek Technology Corporation – 4A, 21V, 500kHz Synchronous Step-Down Converter

RT7264A
Parameter
EN Current
SYNC Threshold ^Logic-High
Voltage
Logic-Low
SYNC Frequency Range
SYNC Input Current
Power Good Rising Threshold
Power Good Falling Threshold
Power Good Sink Current
Capability
Power Good Leakage Current
Under Voltage Lockout
Threshold
Under Voltage Lockout
Threshold Hysteresis
VCC Regulator
VCC Load Regulation
Soft-Start Period
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Symbol
I_EN
V_SYNCH
V_SYNCL
f_SYNC
I_SYNC
V_UVLO
ΔV_UVLO
t_SS
T_SD
ΔT_SD
Test Conditions
V_EN = 2V
V_EN = 0V
V_SYNC = 6V
Sink 4mA
V_IN Rising
I_CC = 5mA
C_SS = 47nF
Min Typ Max Unit
--
1
--
μA
--
0
--
1.8 --
--
V
--
-- 0.4
0.3 --
2 MHz
-- 1.5 2.5 μA
--
90
--
%
--
70
--
%
--
-- 0.4 V
-- 10 -- nA
3.8 4 4.2 V
-- 400 -- mV
--
5
--
V
--
5
--
%
-- 4.7 -- ms
-- 150 --
°C
-- 30 --
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 at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. 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 ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS7264A-01 September 2012