RT5112A
Parameter
Symbol
Test Conditions
Leak current, HWEN = H, V
IN_SYS
= V
IN_B1
= V
IN_B2
= V
IN_VIN12
=
V
IN_VIN3
= V
IN_VIN4
= 2.5V to
5.5V,
40°C
to 85°C
Min
Typ
Max
Unit
A
Leakage Current
I
LEAK
--
--
1.5
V
SYS
Under-Voltage
UVLO
Lockout Threshold Rising
Hysteresis Voltage of
UVLO
HWEN Control
HWEN Low Level Input
Voltage
HWEN High Level Input
Voltage
HWEN Pull Down
Resistor
Input Voltage Range
Output Voltage Range
Output Voltage Step
Output Voltage Accuracy
Switching Frequency
P-Channel MOSFET On
Resistance
N-Channel MOSFET On
Resistance
Maximum Duty Cycle
Output Discharge
Resistor
Over-Voltage Rising
Threshold Detection
Over-Voltage Falling
Threshold Detection
Under-Voltage Rising
Threshold Detection
Under-Voltage Falling
Threshold Detection
V
IL
V
IH
R
EN
UVLO_H
--
--
2.35
100
2.45
--
V
mV
--
1.2
--
--
--
1
0.4
--
-
V
V
M
Step Down Converter Buck1 (V
IN_B1
= 3.8V, C1 = C2 = 10F, L1 = 1H)
V
IN_B1
V
OUT_BUCK1
V
OUT_ACCBUCK1
f
SW_BUCK1
R
ON_HG_BUCK1
R
ON_LG_BUCK1
D
MAX_BUCK1
R
DIS_BUCK1
OVP
_R_BUCK1
All output range of V
OUT_BUCK1
,
I
OUT
= I
OUT(MAX)
V
OUT_BUCK1
= 1.1V, operating
under CCM
From VINB1 pin to LXB1 pin
From LXB1 pin to GNDB1 pin
2.5
0.6
--
2
2
--
--
--
80
--
--
--
12.5
--
2.5
150
70
--
100
V
OUT_
BUCK1
5.5
3.3
--
2
3
200
140
100
140
--
V
V
mV
%
MHz
m
m
%
V
x 120%
V
OUT_
OVP
_F_BUCK1
--
BUCK1
--
V
x 109%
V
OUT_
UVP
_R_BUCK1
--
BUCK1
--
V
x 92%
V
OUT_
UVP
_F_BUCK1
--
BUCK1
--
V
x 80%
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS5112A-02 August 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
