19-0587; Rev 2; 8/09
High-Efficiency, Low-I , PMICs with Dynamic
Q
Voltage Management for Mobile Applications
0B/MAX861
General Description
Features
The MAX8660/MAX8661 power management ICs
(PMICs) power applications processors (APs) in smart
cellular phones, PDAs, Internet appliances, and other
portable devices.
o Optimized for Marvell PXA3xx and PXA168
Applications Processors
o Protected to 7.5V—Shutdown Above 6.3V
o Four Synchronous Step-Down Converters
Four step-down DC-DC outputs, three linear regulators,
and an 8th always-on LDO are integrated with power-
management functions. Two dynamically controlled DC-
DC outputs power the processor core and internal mem-
ory. Two other DC-DC converters power I/O, memory,
and other peripherals. Additional functions include on/off
control for outputs, low-battery detection, reset output,
and a 2-wire I2C serial interface. The MAX8661 functions
the same as the MAX8660, except it lacks the REG1
step-down regulator and the REG7 linear regulator.
REG1, REG2, REG3, REG4
o Four LDO Regulators
REG5, REG6, REG7, REG8
o 2MHz Switching Allows Small Components
o Low, 20µA Deep-Sleep Current
o Low-Battery Monitor and Reset Output
Ordering Information
All step-down DC-to-DC outputs use fast 2MHz PWM
switching and tiny external components. They automati-
cally switch from PWM to high-efficiency, light-load
operation to reduce operating current and extend bat-
tery life. In addition, a forced-PWM option allows low-
noise operation at all loads. Overvoltage lockout pro-
tects the device against inputs up to 7.5V.
PART
PIN-PACKAGE
OPTIONS
V1: 3.3V, 3.0V, 2.85V
V2: 3.3V, 2.5V, 1.8V
V3: 1.4V (default)
V4: 1.4V (default)
MAX8660ETL+
40 Thin QFN
V1: 3.3V, 3.0V, 2.85V
V2: 3.3V, 2.5V, 1.8V
V3: 1.4V (default)
V4: 1.4V (default)
Applications
PDAs, Palmtops, and Wireless Handhelds
MAX8660ETL/V+
40 Thin QFN
Smart Cell Phones
Personal Media Players
Digital Cameras
Note: All devices are specified over the -40°C to 85°C operating
temperature range.
Portable GPS Navigation
+Denotes lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Ordering Information continued at end of data sheet.
Pin Configuration
Simplified Functional Diagram
TOP VIEW
MAIN BATTERY
30 29 28 27 26 25 24 23 22 21
IN
VCC_IO: (PIN PROG)
3.3V/3.0V/2.85V AT 1.2A
V1
20
31
32
33
V8
EN34
EN2
19 AGND
18 IN
MAX8660
VCC_MEM: (PIN PROG)
1.8V/2.5V/3.3V AT 0.9A
VCC_APPS: (I2C PROG)
V2
V3
SRAD
LBR
LBF
LBO
17 IN8
PG1 (GND) 34
MAX8660ETL+
MAX8660AETL+
MAX8660BETL+
MAX8661ETL+
0.725 TO 1.8V, DVM AT 1.6A
16
PG2
15 LX2
14
35
36
37
38
39
40
LX1 (N.C.)
PV1 (PV)
EN1 (GND)
V1 (GND)
SET1 (GND)
V4
nBATT_FAULT
nRESET
VCC_SRAM: (I2C PROG)
0.725 TO 1.8V, DVM AT 0.4A
VCC_MVT: (I2C PROG)
1.7V TO 2.0V AT 200mA
VCC_CARD1: (I2C PROG)
1.8V TO 3.3V AT 500mA
V4
V5
V6
V7
V8
RSO
PV2
13 LBO
12
MR
I2C
INTERFACE
SCL
SDA
11 SCL
EXPOSED PAD (EP)
SDA
VCC_CARD2: (I2C PROG)
1.8V TO 3.3V AT 500mA
1
2
3
4
5
6
7
8
9
10
SYS_EN
PWR_EN
EN1,2,5
EN34
VCC_BBATT:
3.3V ALWAYS ON AT 30mA
THIN QFN
5mm x 5mm x 0.8mm
( ) ARE FOR THE MAX8661
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.