(V
CHGIN
= 5.0V, V
BAT
= 3.7V, T
A
= -40°C to +85°C, all registers in their default state, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BUCK REGULATOR 2
(V
SYS
= +3.7V, L = 2.2µH, C = 2.2µF, V
B2OUT
= 1.2V)
Input Voltage
V
IN_BUCK2
Input voltage = V
SYS
2.7
5.5
V
Output Voltage
V
OUT_BUCK2
50mV step resolution
0.7
3.85
V
Output UVLO Voltage
V
UVLO_BUCK2
Note:
For V
OUT
< UVLO ZC is
imposed. Falling edge (75mV typ
hysteresis)
0.35
0.55
V
Quiescent Supply
Current
I
Q_BUCK2
Buck enabled, I
B2OUT
= 0mA,
V
SYS
= 3.7V, V
B2OUT
= 1.2V
(Note 2)
1
1.4
µA
Dropout Quiescent
Supply Current
I
QDO_BUCK2
I
B2OUT
= 0mA, V
SYS
– V
B2OUT
≤ 0.1V
1.1
mA
Shutdown Supply
Current with Active
Discharge Enabled
I
SD_BUCK2
Buck1 disabled, Buck2ActDSC = 1.
60
µA
Output Accuracy
ACC
BUCK2
I
B2OUT
= 1mA, V
B2OUT
< 3.4V
-2.5
+2.5
%
Peak-to-Peak Ripple
V
PPRIPPLE2
Buck2ISet
= 100mA, C
OUT
= 2.2µF,
I
B2OUT
= 1mA
10
mV
I
PEAK
Set Range
I
PEAK_BUCK2
25mA step resolution set by
Buck2ISet[3:0].
50
375
mA
Load Regulation Error
V
LOADR_BUCK2
Buck2ISet
= 150mA,
Buck2IAdptEnb = 0, I
B2OUT
=
300mA
-3
%
Line Regulation Error
V
LINER_BUCK2
V
B2OUT
= 1.2V; V
SYS
from 2.7V
to 5.5V
3
mV
Maximum Operating
Output Current
I
OUT_BUCK2
V
SYS
= 3.7V, Buck2VSet = 1.2V,
Buck2ISet
= 200mA, Buck2IAdptEnb
= 0, load regulation = -5%
200
500
mA
B2OUT Pulldown
Current
I
LEAK_B2OUT
Buck2 enabled
220
nA
B2OUT Pulldown
Resistance
R
PD_B2OUT
Buck2 disabled, V
B2OUT
= 1.2V
6
MΩ
pMOS On-Resistance
R
ONP_BUCK2
Buck2FFET = 0
0.27
0.5
Ω
Buck2FFET = 1
0.55
1
Ω
nMOS On-Resistance
R
ONN_BUCK2
Buck2FFET = 0
0.24
0.45
Ω
Buck2FFET = 1
0.43
0.9
Ω
Freewheeling
On-Resistance
R
ONFW_BUCK2
V
SYS
= 3.7V, V
B2OUT
= 1.2V
7.3
13
Ω
MAX20335
PMIC with Ultra-Low I
Q
Voltage Regulators and
Battery Chargers for Small Lithium Ion Systems
www.maximintegrated.com
Maxim Integrated
│
9
Electrical Characteristics (continued)
