RT5112A
Parameter
FB2 Leakage Current
Symbol
I
FB2_LK
Test Conditions
Buck2 disable, 0x0B[2] = 0
(Buck2 discharge disable), V
IN_B2
= 5.5V, V
LXB2
= 5.5V, V
FB2
= 5.5V
Buck2 disable, 0x0B[2] = 0
(Buck 2discharge disable), V
IN_B2
= 5.5V, V
LXB2
= 0 or 5.5V
2.5V
V
IN_B2
5.5V
V
IN_B2
= 3.6V
V
IN_B2
= 3.6V, CCM
V
IN_B2
= 3.6V, V
OUT_BUCK2
=
1.8V
V
IN_B2
= V
OUT_BUCK2
= 3.3V
Min
0
Typ
50
Max
100
Unit
nA
Switch Leakage Current
UG Peak Current Limit
LG Valley Current Limit
LG Negative Current
Limit
Minimum On Time
Minimum Off Time
I
LXB2_LK
I
CL_peak_B2
I
CL_valley_B2
I
NCL_NEG_B2
t
MIN_ON_B2
t
MIN_OFF_B2
0
1.5
1
0.5
167
20
--
2
1.5
--
200
40
1
2.5
2
3
250
60
A
A
A
A
ns
ns
Low Dropout Voltage Regulator LDO1 and LDO2 (V
IN_VIN12
= V
OUT_LDO1
/V
OUT_LDO2
+ 1V, V
HWEN
= 1.2V, I
OUT
= 1mA, C
IN
= 2.2F, C
OUT
= 2.2F)
Input Voltage Range
Output Voltage Range
Output Voltage Step
Maximum Output Current
V
IN_VIN12
V
OUT_LDO1
/
V
OUT_LDO2
I
OUT_LDO1
/
I
OUT_LDO2
t
SS_LDO1
/
Time from V
OUT_LDO1
/ V
OUT_LDO2
start rising to 90% nominal value,
V
OUT_LDO1
/ V
OUT_LDO2
= 2.8V, no
load
All output range of V
OUT_LDO1
/
V
OUT_LDO2
, I
OUT
= I
OUT(MAX)
I
OUT
= 0 to I
OUT(MAX)
I
OUT
= 50mA to 300mA, V
IN_VIN12
= 3.0V to 4.4V, V
O
= 2.8V
I
OUT
= 300mA,
V
OUT_LDO1
/V
OUT_LDO2
= 2.8V
(Note 5)
1.9
0.6
--
300
--
2.8
25
--
5.5
3.775
--
--
V
V
mV
mA
Soft-Start Time
t
SS_LDO2
V
OUT_ACCLDO1
/
V
OUT_ACCLDO2
V
LOAD_REG_LDO1
/
V
LOAD_REG_LDO2
V
LINE_REG_LDO1
/
V
LINE_REG_LDO2
V
DROPLDO1
/
V
DROPLDO2
R
DIS_LDO1
/
R
DIS_LDO2
OVP
_R_LDO1
/
OVP
_R_LDO2
--
--
150
s
DC Output Voltage
Accuracy
Load Regulation
Line Regulation
2
0.5
0.5
--
--
--
2
0.5
0.5
%
%
%
Dropout Voltage
Output Discharge
Resistor
--
--
250
mV
--
10
V
OUT_
LDO1
/
--
Over-Voltage Rising
Threshold Detection
--
VOUT_
LDO2
--
V
x 120%
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS5112A-02 August 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
