RT4805
Parameter
Symbol
VIL
VREG
TON
DMAX
FSW
Test Conditions
Min
--
Typ Max Unit
Logic Level Low EN, VSEL,
nBYP, SCL, SDA
--
--
0.4
2
V
%
Output Voltage Accuracy
Minimum On Time
VOUT VIN > 100mV, PWM
2
--
VIN = 3V, VOUT = 3.5V,
ILOAD > 1000mA
80
--
--
ns
Maximum Duty Cycle
Switching Frequency
40
2
--
%
VIN = 2.65V, VOUT = 3.5V,
ILOAD = 1000mA
2.5
3
MHz
Boost Valley Current Limit
Soft-Start Input Current Limit
Soft-Start Input Current Limit
ICL
VIN = 2.9V
LIN1
3.5
--
4
4.5
--
A
ISS_PK
ISS_PK
1000
2000
mA
mA
LIN2
--
--
Pass Through Mode Current
Limit
IBPCL
VIN = 3.2V
--
--
--
--
4
--
A
N-Channel Boost Switch
RDS(ON)
RDSN
VIN = 3.2V, VOUT = 3.5V
VIN = 3.2V, VOUT = 3.5V
VIN = 3.2V, VOUT = 3.5V
60
40
40
95
80
60
m
m
m
P-Channel Boost Switch
RDS(ON)
RDSP
N-Channel Bypass Switch
RDS(ON)
RDSP_BYP
Hot Die Trigger Threshold
Hot Die Release Threshold
Over Temperature Protection
THD
--
--
--
100
90
--
--
--
oC
oC
oC
THDR
TOTP
160
Over Temperature Protection
Hysteresis
TOTP_HYS
TRST
--
--
20
1
--
--
oC
FAULT Restart Time
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 at TA = 25C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
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
DS4805-03 April 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
