RT7291A/B
Parameter
UVP Trip Threshold
UVP Propagation Delay
Reference and Soft-Start
Output Voltage Valley
Soft-Start Time
Enable and UVLO
EN Input High Voltage
EN Hysteresis
EN Input Current
VCC UVLO Rising
VCC UVLO Hysteresis
CLK Output
CLK Output
Voltage
CLK Frequency
LDO Regulator
LDO Regulator
V
LDO
RT7291A
RT7291B
EN = GND,
LDO load current = 5mA
EN = GND,
LDO load current = 100mA
R
SW
4.95
5.049
--
--
--
5
5.1
1
5
3
5.05
5.151
--
%
--
5
V
High-Level
Low-Level
V
CLKH
V
CLKL
f
CLK
I
VCLK
=
10mA
I
VCLK
= 10mA
RT7291A
RT7291B
--
--
0
--
--
--
0.1
300
5.05
5.151
0.2
--
kHz
V
V
ENH
V
ENHYS
I
EN
V
CCUVLO
V
CCHYS
V
EN
= 2V
V
EN
= 0V
RT7291A
RT7291B
1.25
1.3
--
--
--
--
--
1.35
1.4
200
1
0
4.2
400
1.45
1.5
--
--
--
--
--
V
mV
A
V
mV
V
OUT
T
SS
RT7291A
RT7291B
From EN high to PGOOD high
4.95
5.049
1
5
5.1
1.5
5.05
5.151
2
V
ms
Symbol
V
UVP
T
UVPDLY
Test Conditions
With respect to output voltage
Min
55
--
Typ
60
5
Max
65
--
Unit
%
s
LDO Load Regulation
Switch On-Resistance
VCC Regulator
RT7291A
VCC Regulator
VCC Switch Over Threshold to
VBYP
VCC Switch Over Hysteresis
Switch Over On-Resistance
V
VCC
RT7291B
RT7291A
V
BYP
rising edge
V
BYP
falling edge
RT7291B
4.805
4.905
4.45
4.542
--
--
5
5.1
4.6
4.692
200
3
5.295
V
5.395
4.75
V
4.842
--
5
mV
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7291A/B-03 January 2018
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
