RT5112A
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Buck2 disable, 0x0B[2] = 0
FB2 Leakage Current
(Buck2 discharge disable), VIN_B2
= 5.5V, VLXB2 = 5.5V, VFB2 = 5.5V
0
50
100
nA
IFB2_LK
Buck2 disable, 0x0B[2] = 0
(Buck 2discharge disable), VIN_B2
= 5.5V, VLXB2 = 0 or 5.5V
Switch Leakage Current
0
--
1
A
ILXB2_LK
UG Peak Current Limit
LG Valley Current Limit
2.5V
V
5.5V
1.5
1
2
2.5
2
A
A
ICL_peak_B2
ICL_valley_B2
IN_B2
1.5
VIN_B2 = 3.6V
LG Negative Current
Limit
0.5
--
3
A
INCL_NEG_B2
VIN_B2 = 3.6V, CCM
V
1.8V
IN_B2 = 3.6V, VOUT_BUCK2
=
Minimum On Time
Minimum Off Time
167
20
200
40
250
60
ns
ns
tMIN_ON_B2
tMIN_OFF_B2
VIN_B2 = VOUT_BUCK2 = 3.3V
Low Dropout Voltage Regulator LDO1 and LDO2 (VIN_VIN12 = VOUT_LDO1/VOUT_LDO2 + 1V, VHWEN = 1.2V, IOUT
= 1mA, CIN = 2.2F, COUT = 2.2F)
Input Voltage Range
Output Voltage Range
Output Voltage Step
1.9
0.6
--
--
5.5
3.775
--
V
V
VIN_VIN12
2.8
25
VOUT_LDO1
VOUT_LDO2
IOUT_LDO1
/
mV
/
Maximum Output Current
300
--
--
mA
s
IOUT_LDO2
Time from VOUT_LDO1/ VOUT_LDO2
start rising to 90% nominal value,
tSS_LDO1
/
Soft-Start Time
--
--
150
VOUT_LDO1/ VOUT_LDO2 = 2.8V, no
tSS_LDO2
load
DC Output Voltage
Accuracy
VOUT_ACCLDO1
VOUT_ACCLDO2
VLOAD_REG_LDO1
VLOAD_REG_LDO2
VLINE_REG_LDO1
VLINE_REG_LDO2
/
All output range of VOUT_LDO1
/
--
--
--
2
%
%
%
2
VOUT_LDO2, IOUT = IOUT(MAX)
/
Load Regulation
Line Regulation
0.5
0.5
0.5
0.5
I
OUT = 0 to IOUT(MAX)
/
IOUT = 50mA to 300mA, VIN_VIN12
= 3.0V to 4.4V, VO = 2.8V
IOUT = 300mA,
VDROPLDO1
/
Dropout Voltage
--
--
--
250
--
mV
VOUT_LDO1/VOUT_LDO2 = 2.8V
(Note 5)
VDROPLDO2
Output Discharge
Resistor
RDIS_LDO1
/
10
RDIS_LDO2
VOUT_
/
LDO1
Over-Voltage Rising
Threshold Detection
OVP_R_LDO1
/
--
--
V
VOUT_
OVP_R_LDO2
LDO2
x 120%
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8
DS5112A-02 August 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
