MAX8662 データシートの表示（PDF） - Maxim Integrated
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MAX8662 Datasheet PDF : 34 Pages
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Power-Management ICs for
Single-Cell, Li+ Battery-Operated Devices
PIN
MAX8662 MAX8663
19
16
20
17
21
18
22
19
23
20
24
21
25
22
26
23
27
24
28
25
29
—
30
—
31
—
32
26
33
27
34
28
35
29
36
30
37
31
38
32
39
—
Pin Description (continued)
NAME
FUNCTION
IN45
OUT5
EN4
EN5
PWM
FB1
EN1
PG1
LX1
PV1
OVP
CS
CC3
FB2
PV2
LX2
PG2
EN2
EN6
EN7
LX3
Input Supply for Linear Regulators 4 and 5. Connect IN45 to a supply voltage between 1.7V
and VSYS. Connect at least a 1µF ceramic capacitor from IN45 to GND.
Linear Regulator 5 Output. Delivers up to 150mA at an output voltage determined by SL1
and SL2. Connect a 1µF ceramic capacitor from OUT5 to GND. Increase the value to 2.2µF
if VOUT5 < 1.5V.
Enable Input for Linear Regulator 4. Drive high to enable.
Enable Input for Linear Regulator 5. Drive high to enable.
PWM/Skip-Mode Selector. Drive PWM high to force step-down regulators 1 and 2 to
operate in 1MHz forced-PWM mode. Drive PWM low, or connect to GND to allow regulators
1 and 2 to enter skip mode at light loads.
Feedback Input for Buck Regulator 1. Connect FB1 to the center of a resistor-divider
connected between OUT1 and GND to set the output voltage between 0.98V and 3.3V.
Enable Input for Buck Regulator 1. Drive high to enable.
Power Ground for Buck Regulator 1. GND, PG1, PG2, and PG3 must be connected
together externally.
Buck Regulator 1 Inductor Connection Node. Connect an inductor from LX1 to the output of
regulator 1.
Power Input for Buck Regulator 1. Connect PV1 to SYS and decouple with a 10µF or greater low-
ESR capacitor to GND. PV1, PV2, and SYS must be connected together externally.
LED Boost Overvoltage Input. Connect a resistor from OVP to the boost output to set the
maximum output voltage and to initiate soft-start when EN3 goes high. An internal 20µA
pulldown current from OVP to GND determines the maximum boost voltage. The internal
current is disconnected when EN3 is low. OVP is diode clamped to SYS_.
LED Current Source. Sinks from 1mA to 30mA depending on the voltage at BRT and the
PWM signal at EN3. Driving EN3 low for more than 2ms turns off the current source. VCS is
regulated to 0.32V.
Compensation Input for LED Boost Regulator 3. See the Boost Converter with White LED Driver
(OUT3, MAX8662 Only) section.
Feedback Input for Buck Regulator 2. Connect FB2 to the center of a resistor-divider
connected between OUT2 and GND to set the output voltage between 0.98V and 3.3V.
Power Input for Buck Regulator 2. Connect PV2 to SYS and decouple with a 10µF or
greater low-ESR capacitor to GND. PV1, PV2, and SYS must be connected together
externally.
Buck Regulator 2 Inductor Connection Node. Connect an inductor from LX2 to the output of
regulator 2.
Power Ground for Buck Regulator 2. GND, PG1, PG2, and PG3 must be connected together
externally.
Enable Input for Buck Regulator 2. Drive high to enable.
Enable Input for Linear Regulator 6. Drive high to enable.
Enable Input for Linear Regulator 7. Drive high to enable.
Boost Regulator 3 Inductor Connection Node. Connect an inductor from LX3 to SYS_.
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