MAX8660 Datasheet, PDF (1/42 Pages) Maxim Integrated Products – High-Efficiency, Low-IQ, PMICs with Dynamic Voltage Management for Mobile Applications

19-0587; Rev 1; 10/06
High-Efficiency, Low-I_Q, PMICs with Dynamic
Voltage Management for Mobile Applications
General Description
The MAX8660/MAX8661 power management ICs
(PMICs) power Intel XScale^® applications processors in
smart cellular phones, PDAs, Internet appliances, and
other portable devices.
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.
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.
Applications
PDAs, Palmtops, and Wireless Handhelds
Smart Cell Phones
Personal Media Players
Portable GPS Navigation Digital Cameras
Features
o Optimized for Intel XScale Processors
o Protected to 7.5V—Shutdown Above 6.3V
o Four Synchronous Step-Down Converters
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
PART
PIN-
PKG
PACKAGE CODE
OPTIONS
MAX8660ETL+
40 Thin QFN
5mm x 5mm
T4055-1
V1: 3.3V, 3.0V, 2.85V
V2: 3.3V, 2.5V, 1.8V
MAX8660AETL+
40 Thin QFN
5mm x 5mm
T4055-1
V1: 2.5V, 2.0V, 1.8V
V2: 2.5V, 2.0V, 1.8V
MAX8661ETL+
40 Thin QFN _T4055-1 No REG1 and REG7
5mm x 5mm
V2: 3.3V, 2.5V, 1.8V
Note: All devices are specified over the -40°C to 85°C operating
temperature range.
+Denotes lead-free package.
Pin Configuration
Simplified Functional Diagram
TOP VIEW
30 29 28 27 26 25 24 23 22 21
EN34 31
20 V8
EN2 32
19 AGND
SRAD 33
18 IN
PG1 (GND) 34
LX1 (N.C.) 35
PV1 (PV) 36
EN1 (GND) 37
MAX8660ETL+
MAX8660AETL+
MAX8661ETL+
17 IN8
16 PG2
15 LX2
14 PV2
V1 (GND) 38
13 LBO
SET1 (GND) 39
V4 40
EXPOSED PAD (EP)
12 SDA
11 SCL
1 2 3 4 5 6 7 8 9 10
THIN QFN
5mm x 5mm x 0.8mm
( ) ARE FOR THE MAX8661
MAIN BATTERY
IN
V1
nBATT_FAULT
nRESET
I²C
INTERFACE
SYS_EN
PWR_EN
MAX8660
V2
LBR
LBF
V3
LBO
V4
RSO
MR
V5
SCL
V6
SDA
EN1,2,5 V7
EN34
V8
VCC_IO: (PIN PROG)
3.3V/3.0V/2.85V AT 1.2A
VCC_MEM: (PIN PROG)
1.8V/2.5V/3.3V AT 0.9A
VCC_APPS: (I²C PROG)
0.725 TO 1.8V, DVM AT 1.6A
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
VCC_CARD2: (I²C PROG)
1.8V TO 3.3V AT 500mA
VCC_BBATT:
3.3V ALWAYS ON AT 30mA
Intel XScale is a registered trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.