RT5112A
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Step Down Converter Buck1 (VIN_B1 = 3.8V, C1 = C2 = 10F, L1 = 1H)
Maximum Output Current
Load Regulation
1.2
--
--
--
--
A
IOUT_BUCK1
1.5
%
VLOAD_REG_BUCK1 CCM, VOUT_BUCK1 = 1.1V
CCM, IOUT = 50/300/1200mA,
VLINE_REG_BUCK1
Line Regulation
--
--
1.5
%
VOUT_BUCK1 = 1.1V, VIN_B1
3.0V to 4.4V
=
CCM, VOUT_BUCK1 = 1.1V, VIN_B1
< 4.35V
--
--
--
10
40
Output Ripple
mV
VRIPPLE_BUCK1
PFM, VOUT_BUCK1 = 1.1V, VIN_B1
< 4.35V
30
0x09[7:6] = 10, time from
VOUT_BUCK1 = 0V rising to 90%
Soft-Start Time
Load Transient
Efficiency
--
--
235
--
--
70
--
s
tSS_BUCK1
nominal value, VOUT_BUCK1
1.1V, no load
=
VOUT_BUCK1 = 1.1V, 20 to 80%
IOUT(MAX), 1? s, recovery time
< 10? s
VTRAN_BUCK1
Eff_BUCK1
VOUT_BUCK1 = 1.1V, IOUT =
200mA to 600mA
85
--
Step Down Converter Buck2 (VIN_B2 = 3.8V, C3 = C4 = 10F, L2 = 1H)
Maximum Output Current
1.2
--
--
--
--
A
IOUT_BUCK2
VLOAD_REG_BUCK2
Load Regulation
1.5
%
CCM, VOUT_BUCK2 = 2.85V
CCM, IOUT = 50/300/1200mA,
VLINE_REG_BUCK2
Line Regulation
Output Ripple
--
--
1.5
%
VOUT_BUCK2 = 2.85V, VIN_B2
3.0V to 4.4V
=
CCM, VOUT_BUCK2 = 2.85 V,
--
--
--
20
50
V
IN_B2 < 4.35V
PFM, VOUT_BUCK2 = 2.85V,
IN_B2 < 4.35V
0x09[7:6] = 10, time from
VOUT_BUCK2 = 0V rising to 90%
mV
VRIPPLE_BUCK2
40
V
Soft-Start Time
--
607
--
s
tSS_BUCK2
nominal value, VOUT_BUCK2
2.85V, no load
=
VOUT_BUCK2 = 2.85V, 20 to 80%
Load Transient
Efficiency
--
--
--
80
--
mV
%
VTRAN_BUCK2
I
OUT(MAX), 1s, recovery time <
10s
VOUT_BUCK2 = 2.85V, IOUT
200mA to 600mA
=
93
Eff_BUCK2
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12
DS5112A-02 August 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
