(V
BAT
= 3.7V, V
CHGIN
= 0V, registers in their default state, T
A
= +25°C, unless otherwise noted.)
1.70
1.74
1.78
1.82
1.86
1.90
0
100
200
300
400
V
B2
O
UT
(V
)
I
B2OUT
(mA)
V
B2OUT
vs. LOAD
V
B2OUT
= 1.8V
toc19
V
BAT
= 3.3V, 3.7V, 4.2V
0
10
20
30
40
50
60
70
80
90
100
0.001
0.1
10
1000
EF
FI
C
IEN
C
Y (
%
)
I
B1OUT
(mA)
BUCK1 EFFICIENCY vs. LOAD
toc22
V
BAT
= 3.3V
V
BAT
= 3.7V
V
BAT
= 4.2V
V
B1OUT
= 0.7V
INDUCTOR = TOKO
DFE201610E0-2R2M
0.60
0.64
0.68
0.72
0.76
0.80
0
100
200
300
400
V
B2
O
UT
(V
)
I
B2OUT
(mA)
V
B2OUT
vs. LOAD
V
B2OUT
= 0.7V
toc20
V
BAT
= 3.3V, 3.7V, 4.2V
1.00
1.05
1.10
1.15
1.20
1.25
1.30
0
100
200
300
400
V
B1
OU
T
(V
)
I
B1OUT
(mA)
V
B1OUT
vs. LOAD
V
B1OUT
= 1.2V
toc23
V
BAT
= 3.3V, 3.7V, 4.2V
0
10
20
30
40
50
60
70
80
90
100
0.001
0.1
10
1000
EF
FI
C
IEN
C
Y (
%
)
I
B1OUT
(mA)
BUCK1 EFFICIENCY vs. LOAD
toc21
V
BAT
= 3.3V
V
BAT
= 3.7V
V
BAT
= 4.2V
V
B1OUT
= 1.2V
INDUCTOR = TOKO
DFE201610E0-2R2M
0.60
0.65
0.70
0.75
0.80
0
100
200
300
400
V
B1
O
UT
(V
)
I
B1OUT
(mA)
V
B1OUT
vs. LOAD
V
B1OUT
= 0.7V
toc24
V
BAT
= 3.3V, 3.7V, 4.2V
50mA/div
toc25
20
µ
s/div
BUCK1 TRANSIENT RESPONSE
V
B1OUT
20mV/div
I
B1OUT
V
B1OUT
= 1.2V
50mA/div
toc26
20
µ
s/div
BUCK2 TRANSIENT RESPONSE
V
B2OUT
20mV/div
I
B2OUT
V
B2OUT
= 1.8V
MAX20335
PMIC with Ultra-Low I
Q
Voltage Regulators and
Battery Chargers for Small Lithium Ion Systems
Maxim Integrated
│
24
www.maximintegrated.com
Typical Operating Characteristics (continued)