RT6259A/B
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
m
A
RDS(ON)
RDS(ON)_H
RDS(ON)_L
High-Side
Low-Side
(VBOOT VSW) = 5.5V
--
--
70
70
--
--
Switch On
Resistance
Current Limit
Current Limit
ILIM
4
5
6
Thermal Shutdown
Thermal Shutdown Threshold TSD
Thermal Shutdown Hysteresis TSD
On-Time Timer Control
Shutdown Temperature
--
--
150
20
--
--
C
On-Time
tON
VIN = 12V, VOUT = 1.05V
VFB = 0.7V
--
--
135
260
--
ns
ns
Minimum Off-Time
Soft-Start
tOFF(MIN)
310
SS Charge Current
VSS = 0V
1.4
0.1
--
2
2.6
--
A
mA
A
VSS = 0.5V (Latch Mode)
VSS = 0.5V (Hiccup Mode)
0.2
0.5
SS Discharge Current
--
UVLO
UVLO Threshold
Hysteresis
Wake Up VREG5
3.6
3.85
0.35
4.1
V
0.13
0.47
Power Good
85
--
90
85
5
95
--
VFB Rising
%
PGOOD Threshold
VFB Falling
2.5
--
mA
PGOOD Sink Current
PGOOD = 0.5V
Output Under Voltage and Over Voltage Protection
114
--
120
5
126
--
%
OVP Trip Threshold
OVP Prop Delay
UVP Trip Threshold
UVP Hysteresis
OVP Detect
s
65
--
70
10
250
75
--
%
--
--
UVP Prop Delay
s
tSS
x 1.7
--
--
ms
UVP Enable Delay
tUVPEN
Relative to Soft-Start Time
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. The device is not guaranteed to function outside its operating conditions.
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6259A/B-01 September 2015
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
