Datasheet

MAX8662/MAX8663
Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
______________________________________________________________________________________
11
OUT1 REGULATOR LIGHT-LOAD
SWITCHING WAVEFORMS
MAX8662/63 toc25
20
µ
s/div
V
OUT1
AC-COUPLED
V
LX
I
L
50mV/div
2V/div
200mA/div
V
BAT
= 4.0V
I
OUT1
= 10mA
PWM = 0
OUT1 REGULATOR HEAVY-LOAD
SWITCHING WAVEFORMS
MAX8662/63 toc26
1
µ
s/div
V
OUT1
AC-COUPLED
V
LX
I
L
10mV/div
2V/div
500mA/div
V
BAT
= 4.2V
I
OUT1
= 1200mA
OUT1 REGULATOR LOAD-
TRANSIENT RESPONSE
MAX8662/63 toc27
40
µ
s/div
V
OUT1
V
LX
I
OUT1
I
L
100mV/div
5V/div
1A/div
1A/div
V
BAT
= 4.0V
I
OUT1
= 10mA TO 1200mA TO 10mA
PWM = 0
OUT1 REGULATOR LINE-
TRANSIENT RESPONSE
MAX8662/63 toc28
100
µ
s/div
V
OUT1
V
SYS
V
LX
I
L
200mA/div
5V/div
50mV/div
1V/div
I
OUT1
= 10mA
PWM = 0
5V
4V
OUT1 ENABLE AND DISABLE RESPONSE
MAX8662 toc29
200mA/div
2V/div
2V/div
400µs/div
V
CEN
= V
L
R
OUT1
= 33I
V
EN1
I
DC
V
OUT1
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
DC
= 5V, R
PSET
= 1.5k, R
ISET
= 3k, V
OUT1
= 3.3V, V
OUT2
= 1.3V, SL1 = SL2 = open, V
CEN
= 0V, V
PEN1
=
V
PEN2
= 5V, C
OUT1
= 2 x 10µF, C
OUT2
= 2 x 10µF, C
OUT3
= 0.1µF, C
OUT4
= 4.7µF, C
OUT5
= 1µF, C
OUT6
= 2.2µF, C
OUT7
= 1µF, CT =
0.068µF, C
REF
= C
VL
= 0.1µF, R
THM
= 10k, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, V
GND
= V
PG1
= V
PG2
= V
PG3
= 0V, T
A
= +25°C,
unless otherwise noted.)
OUT2 REGULATOR EFFICIENCY
vs. LOAD CURRENT
MAX8662/63 toc30
LOAD CURRENT (mA)
OUT2 REGULATOR EFFICIENCY (%)
100101
10
20
30
40
50
60
70
80
90
100
0
0.1 1000
V
BAT
= 4.2V
V
BAT
= 4.2V
V
BAT
= 3.6V
V
BAT
= 3.6V
PWM = 0
PWM = 1
V
OUT1
= 3.3V
MAX8662/63 toc31
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
1000100101
1.27
1.28
1.29
1.30
1.31
1.32
1.26
0.1 10,000
OUT2 REGULATOR LOAD REGULATION
V
BAT
= 3.6V
V
BAT
= 4.2V