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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1702B Datasheet

Triple-Output Power-Management IC

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MAX1702B pdf
MAX1702B
Triple Output Power Management IC for
Microprocessor-Based Systems
General Description
The MAX1702B power-management IC supports ARM
Powered® devices such as the Intel® PXA210 and
PXA250 microprocessors based on the Intel XScale™
micro-architecture. These devices include PDAs, third-
generation smart cellular phones, internet appliances,
automotive in-dash Telematics systems, and other appli-
cations requiring substantial computing and multimedia
capability at low power.
The MAX1702B integrates three ultra-high-performance
power supplies with associated supervisory and manage-
ment functions. Included is a step-down DC-DC converter
to supply 3.3V I/O and peripherals, a step-down DC-DC
converter to supply 0.7V to VIN for the microprocessor
core, and a step-down DC-DC converter to supply either
1.8V, 2.5V, or 3.3V to power the memory.
Management functions include automatic power-up
sequencing, power-on-reset and manual reset with timer,
and two levels of low-battery detection.
The DC-DC converters use fast 1MHz PWM switching,
allowing the use of small external components. They
automatically switch from PWM mode under heavy loads
to skip mode under light loads to reduce quiescent cur-
rent and maximize battery life. The input voltage range is
from 2.6V to 5.5V, allowing the use of three NiMH cells,
a single Li+ cell, or a regulated 5V input. The MAX1702B
is available in a tiny 6mm x 6mm, 36-pin QFN package
and operates over the -40°C to +85°C temperature range.
Applications
● PDA, Palmtop, and Wireless Handhelds
● Third Generation Smart Cell Phones
● Internet Appliances and Web Books
Typical Operating Circuit appears at end of data sheet.
Intel is a registered trademark of Intel Corporation.
XScale is a trademark of Intel Corporation.
ARM and ARM Powered are registered trademarks of ARM
Limited.
Features
● Three Regulators in One Package
• Peripherals and I/O Supply: 3.3V at 900mA
• μP Core Supply: 0.7V to VIN at 400 mA
• Memory Supply: 1.8/2.5/3.3V at 800 mA
● Supports Intel® PXA210 and PXA250
Microprocessors
● Power-On Reset with Manual Reset Input
● Auto Power-Up Sequencing
● 1MHz PWM Switching Allows Small External
Components
Low 5μA Shutdown Current
● Tiny 6mm x 6mm, 36-pin QFN Package
Ordering Information
PART
TEMP RANGE
MAX1702BEGX -40°C to +85°C
PIN-PACKAGE
36 QFN
(6mm x 6mm)
Pin Configuration
TOP VIEW
36 35 34 33 32 31 30 29 28
N.C. 1
LBI 2
DBI 3
27 N.C.
26 N.C.
25 INP2
ON2 4
PGM3 5
GND 6
MAX1702B
24 LX2
23 PG2
22 OUTOK
REF 7
GND 8
N.C. 9
21 COMP2
20 OUT1
19 N.C.
10 11 12 13 14 15 16 17 18
6mm x 6mm QFN
19-2448; Rev 1; 4/15


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1702B Datasheet

Triple-Output Power-Management IC

No Preview Available !

MAX1702B pdf
MAX1702B
Triple Output Power Management IC for
Microprocessor-Based Systems
Absolute Maximum Ratings
IN, FB2, OUT3, COMP1, COMP2, COMP3, PGM3,
ON2, LBO, OUTOK, RSO, MR, LBI, DBI,
OUT1 to GND.......................................................-0.3V to +6V
REF to GND.................................................. -0.3 to (VIN + 0.3V)
INP1, INP2, INP3 to IN.........................................-0.3V to +0.3V
PG1, PG2, PG3 to GND.......................................-0.3V to +0.3V
LX1, LX2, LX3 Continous Current........................... -1.5A to 1.5A
INP1 to PG1.............................................................-0.3V to +6V
INP2 to PG2.............................................................-0.3V to +6V
INP3 to PG3.............................................................. 0.3V to +6V
Output Short-Circuit Duration............................................ Infinite
Continuous Power Dissipation (TA =+70°C) 36-Pin QFN
(derate 22.7 mW/°C)..................................................1818mW
Operating Temperature Range..............................40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10sec).............................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VINP1 = VINP2 = VINP3 = VIN = 3.6V, VLBI = 1.1V, VDBI = 1.35V, MR = ON2 = IN, PGM3 = GND, Circuit of Figure 1, TA = -40°C to
+85°C unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
INP1, INP2, INP3,
IN Supply Voltage Range
INP1, INP2, INP3, IN must be connected together
externally
Undervoltage
Lockout Threshold
VIN rising
VIN falling
ON2 = IN, no load
Quiescent Current
(IINP1 + IINP2 + IINP3 + IIN)
ON2 = GND, no load
VDBI < 1.2 V (shutdown)
LX1-3 = GND
SYNCHRONOUS BUCK PWM REGULATOR 1 (REG1)
OUT1 Voltage Accuracy
OUT1 Input Resistance
3.6V ≤ VINP1 ≤ 5.5V, Load = 0 to 900mA
Error-Amp Transconductance
Dropout Voltage
Load = 800mA, Note 1
P-Channel On-Resistance
N-Channel On-Resistance
Current-Sense Transresistance
ILX1 = 180mA
ILX1 = 180mA, VINP1 = 2.6V
ILX1 = 180mA
P-Channel
Current-Limit Threshold
P-Channel Pulse-Skipping
Current Threshold
N-Channel Zero
Crossing Comparator
OUT1 Maximum
Output Current
2.6V ≤ VINP1 ≤ 5.5V (Note 2)
LX1 Leakage Current
LX1 Duty-Cycle Range
VINP1 = 5.5V, LX1= GND or INP1, VOUT1 = 3.6V
VINP2 = 4.2V
MIN
2.6
2.25
2.2
TYP
2.40
2.35
485
335
5
MAX
5.5
2.55
2.525
20
UNITS
V
V
µA
µA
µA
3.234
200
55
0.40
3.3
400
95
250
0.25
0.3
0.2
0.47
3.366
135
425
0.4
0.5
0.35
0.54
1.15 1.275 1.45
V
kΩ
µS
mV
V/A
A
0.115 0.140 0.160
A
25 55 75 mA
0.9 A
-20 0.1 +20 µA
0 100 %
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX1702B
Description Triple-Output Power-Management IC
Maker Maxim
Total Page 19 Pages
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