RT5021 Datasheet, PDF (10/67 Pages) Richtek Technology Corporation – Channels DC/DC PMU with Li-ion Battery Charger

RT5021
Parameter
Symbol
Test Conditions
Min Typ Max Unit
On Resistance of MOSFET
Current Limitation
VO2−LX2B,
R_{DS (ON)_2 B}
P-MOSFET, VO2 = 3.3V
LX2B − GND,
N-MOSFET VO2 = 3.3V
--
--
I_{LIM_ 2}
Both P-MOSFET (PVD2 − LX2A)
and N-MOSFET (LX2B − GND)
2
200 300 mΩ
150 250 mΩ
2.5
3
A
Over Voltage Protection at VO2
5.82 6 6.18 V
Under Voltage Protection at FB2
Over Load Protection at FB2
Off Discharge Current at VO2
Target voltage is the chosen one
in A4.FB2 [2:0]
--
0.4
--
V
--
Target
− 0.1
--
V
VO2 = 3.3V, SYS = 3.3V
--
20
--
mA
Discharge Finishing Threshold at
VO2
CH3 LV Sync Step-Down
--
0.1
--
V
Feedback Regulation Voltage at
FB3
Minimum On Time for PSM
A5.FB3 [2:0] = 3’b100
0.788 0.8 0.812 V
--
50
--
ns
Maximum Duty Cycle
FB3 = 0.75V
--
-- 100 %
Soft-Start Time
FB3 = 0 to 0.8V
--
4
--
ms
On Resistance of MOSFET
R_{DS(ON)_P} P-MOSFET, PVD3 = 3.3V
R_{DS(ON)_N} N-MOSFET, PVD3 = 3.3V
-- 200 300 mΩ
-- 150 250 mΩ
Current Limitation
I_{LIM _3}
1.3 1.8 2.4
A
Under Voltage Protection at FB3
0.35 0.4 0.45 V
Over Load Protection at FB3
Target voltage is the chosen one
in A5.FB3 [2:0]
--
Target
− 0.1
--
V
Off Discharge Current at LX3
Discharge Finishing Threshold at
FB3
CH4 LV Sync Step-Down
Feedback Regulation Voltage at
FB4
LX3 = 1V, SYS = 3.3V
A5.FB4 [2:0] = 3’b100
--
20
--
mA
--
0.1
--
V
0.788 0.8 0.812 V
Minimum On Time for PSM
--
50
--
ns
Maximum Duty Cycle
FB4 = 0.75V
--
-- 100 %
Soft-Start Time
FB4 = 0 to 0.8V
--
4
--
ms
On Resistance of MOSFET
R_{DS(ON)_P} P-MOSFET, PVD4 = 3.3V
R_{DS(ON)_N} N-MOSFET, PVD4 = 3.3V
-- 300 400 mΩ
-- 200 300 mΩ
Current Limitation
I_{LIM _4}
1.3 1.8 2.4
A
Under Voltage Protection at FB4
0.35 0.4 0.45 V
Over Load Protection at FB4
Target voltage is the chosen one
in A5.FB4 [2:0]
--
Target
− 0.1
--
V
Off Discharge Current at LX4
Discharge Finishing Threshold at
FB4
LX4 = 1V, SYS = 3.3V
--
20
--
mA
--
0.1
--
V
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DS5021-01 April 2013