RT4805B
Parameter
Logic Level Low EN, VSEL,
nBYP, SCL, SDA
Output Voltage Accuracy
Minimum On Time
Maximum Duty Cycle
Switching Frequency
Boost Valley Current Limit
Soft-Start Input Current Limit
Soft-Start Input Current Limit
Pass Through Mode Current
Limit
N-Channel Boost Switch
R
DS(ON)
P-Channel Boost Switch
R
DS(ON)
N-Channel Bypass Switch
R
DS(ON)
Hot Die Trigger Threshold
Hot Die Release Threshold
Over-Temperature Protection
Over-Temperature Protection
Hysteresis
FAULT Restart Time
Symbol
V
IL
V
REG
t
ON
D
MAX
f
SW
I
CL
I
SS_PK
I
SS_PK
I
BPCL
R
DSN
R
DSP
R
DSP_BYP
T
HD
T
HDR
T
OTP
T
OTP_HYS
t
RST
V
IN
= 2.65V, V
OUT
= 3.5V,
I
LOAD
= 1000mA
V
IN
= 2.9V
LIN1
LIN2
V
IN
= 3.2V
V
IN
= 3.2V, V
OUT
= 3.5V
V
IN
= 3.2V, V
OUT
= 3.5V
V
IN
= 3.2V, V
OUT
= 3.5V
V
OUT
V
IN
> 100mV, PWM
V
IN
= 3V, V
OUT
= 3.5V,
I
LOAD
> 1000mA
Test Conditions
Min
--
2
--
40
2
3.5
--
--
--
--
--
--
--
--
--
--
--
Typ
--
--
80
--
2.5
4
1000
2000
4
60
40
40
100
90
160
20
1
Max
0.4
2
--
--
3
4.5
--
--
--
95
80
60
--
--
--
--
--
Unit
V
%
ns
%
MHz
A
mA
mA
A
m
m
m
o
o
o
C
C
C
C
o
ms
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.
JA
is measured under natural convection (still air) at T
A
= 25C with the component mounted on a high
effective-thermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard.
Note 3.
Devices are ESD sensitive. Handling precaution recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS4805B-01
April 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
