RT7258 Datasheet, PDF (6/18 Pages) Richtek Technology Corporation – 8A, 24V, 600kHz Step-Down Converter with Synchronous Gate Driver

RT7258
Parameter
Sync Frequency Range
EN Turn-Off Delay
EN Pull Low Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Power Good Threshold Rising
Power Good Threshold Hysteresis
Power Good Pin Level
BG Driver Bias Supply Voltage
Gate Driver Sink Impedance
Gate Driver Source Impedance
Symbol
f_Sync
t_OFF
T_SD
ΔT_SD
Test Conditions
V_EN = 2V
V_CC
R_Sink
R_Source
PGOOD Sink 10mA
Min Typ Max Unit
0.3 -- 1.5 MHz
--
10
--
μs
--
1
-- μA
-- 150 --
°C
--
20
--
°C
-- 0.75 --
V
--
40
-- mV
--
-- 0.125 V
4.5 5
--
V
-- 0.9 --
Ω
-- 3.3 --
Ω
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.
DS7258-00 January 2012