MAX1703ESE+ Maxim Integrated Products, MAX1703ESE+ Datasheet

IC DC-DC CONV 1.5A LN 16-SOIC

MAX1703ESE+

Manufacturer Part Number
MAX1703ESE+
Description
IC DC-DC CONV 1.5A LN 16-SOIC
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheets

Specifications of MAX1703ESE+

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
5V, 2.5 ~ 5.5 V
Current - Output
1.5A
Frequency - Switching
300kHz
Voltage - Input
0.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Power - Output
696mW
Output Voltage
2.5 V to 5.5 V
Output Current
1.5 A
Input Voltage
0.7 V to 5.5 V
Supply Current
65 uA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1703 is a high-efficiency, low-noise, step-up
DC-DC converter intended for use in battery-powered
wireless applications. It uses a synchronous-rectified
pulse-width-modulation (PWM) boost topology to gen-
erate a 2.5V to 5.5V output from battery inputs, such as
one to three NiCd/NiMH cells or one Li-Ion cell. The
device includes a 2A, 75mΩ, N-channel MOSFET
switch and a 140mΩ, P-channel synchronous rectifier.
With its internal synchronous rectifier, the MAX1703
delivers up to 5% better efficiency than similar nonsyn-
chronous converters. It also features a pulse-frequency-
modulation (PFM) low-power mode to improve efficiency
at light loads, and a 1µA shutdown mode.
The MAX1703 comes in a 16-pin narrow SO package
and includes an uncommitted comparator that generates
a power-good or low-battery-warning output. It also
contains a linear gain block that can be used to build a
linear regulator.
For lower-power outputs and a smaller package, refer
to the MAX1700/MAX1701. For dual outputs (step-up
plus linear regulator), refer to the MAX1705/MAX1706.
For an on-board analog-to-digital converter, refer to the
MAX848/MAX849.
The MAX1703 evaluation kit is available to speed designs.
19-1336; Rev 2; 11/98
________________General Description
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
PWM
0.7V TO 5.5V
GAIN-BLOCK INPUT
INPUT
OR
PFM
OFF
POWER-GOOD
SYNC
INPUT
Typical Operating Circuit
ON
________________________________________________________________ Maxim Integrated Products
ON
CLK/
SEL
POKIN
AIN
REF
FB
MAX1703
Low-Noise, Step-Up DC-DC Converter
GND
LXP, LXN
PGND
POUT
POK
OUT
1-Cell to 3-Cell, High-Power (1.5A),
AO
UP TO 1.5A
5V OR ADJ
OUTPUT
POWER-GOOD
OUTPUT
GAIN-BLOCK
OUTPUT
____________________________Features
________________________Applications
MAX1703ESE
Up to 95% Efficiency
Up to 1.5A Output
Fixed 5V or Adjustable Step-Up Output
(2.5V to 5.5V)
0.7V to 5.5V Input Range
Low-Power Mode (300µW)
Low-Noise, Constant-Frequency Mode (300kHz)
Synchronizable Switching Frequency
(200kHz to 400kHz)
1µA Logic-Controlled Shutdown
Power-Good Comparator
Uncommitted Gain Block
Digital Cordless Phones
PCS Phones
Wireless Handsets
Two-Way Pagers
TOP VIEW
PART
POKIN
GND
OUT
POK
REF
AIN
AO
FB
1
2
3
4
5
6
7
8
TEMP. RANGE
-40°C to +85°C
Ordering Information
Narrow SO
MAX1703
Pin Configuration
Personal Communicators
Palmtop Computers
Hand-Held Instruments
16
15
14
13
12
11
10
9
ON
POUT
LXP
POUT
PGND
LXN
PGND
CLK/SEL
PIN-PACKAGE
16 Narrow SO
1

Related parts for MAX1703ESE+

MAX1703ESE+ Summary of contents

Page 1

... POK AIN GAIN-BLOCK INPUT REF AO FB GND PGND ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. ____________________________Features Up to 95% Efficiency Up to 1.5A Output Fixed 5V or Adjustable Step-Up Output (2.5V to 5.5V) 0.7V to 5.5V Input Range Low-Power Mode (300µ ...

Page 2

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ABSOLUTE MAXIMUM RATINGS OUT, ON, AO, POK to GND .....................................-0.3V to +6V PGND to GND.....................................................................±0.3V LXP, LXN to PGND .................................-0. POUT, CLK/SEL, AIN, REF, FB, POKIN to GND.......................................-0.3V to ...

Page 3

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ELECTRICAL CHARACTERISTICS (continued) (CLK/SEL = AIN = ON = POKIN = FB = PGND = GND, OUT = POUT, LXP = LXN, V otherwise noted. Typical values are at T PARAMETER ...

Page 4

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ELECTRICAL CHARACTERISTICS (continued) (CLK/SEL = AIN = ON = POKIN = FB = PGND = GND, OUT = POUT, LXP = LXN, V otherwise noted. Typical values are ...

Page 5

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter __________________________________________Typical Operating Characteristics (V = +3.6V 5V +25°C, unless otherwise noted.) IN OUT A EFFICIENCY vs. LOAD CURRENT (V = 5V) OUT 100 V = 3.6V IN ...

Page 6

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter _________________________________Typical Operating Characteristics (continued +3.6V 5V +25°C, unless otherwise noted.) IN OUT A FREQUENCY vs. TEMPERATURE 340 330 320 310 OUT 300 ...

Page 7

... Source of P-Channel Synchronous Rectifier MOSFET Switch. Connect an external Schottky diode from LXN 13, 15 POUT and LXP to POUT. 14 LXP Drain of P-Channel Synchronous Rectifier. Connect LXP to LXN. ON On/Off Input. When ON is low, the IC turns on. 16 Dual Mode is a trademark of Maxim Integrated Products. _______________________________________________________________________________________ MAX1703-12 V OUT (100mV/div) I LOAD (0.5A/div) FUNCTION frequency mode ...

Page 8

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter UNDERVOLTAGE LOCKOUT OUT IC POWER 2.15V OUT ON ON REFERENCE 1.25V REF REF GND CLK/SEL FB POKIN AIN Figure 1. Functional Block Diagram _______________Detailed Description The MAX1703 is a highly efficient, ...

Page 9

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter Table 1. Typical Available Output Current INPUT OUTPUT NO. OF CELLS VOLTAGE VOLTAGE (V) 1 NiCd/NiMH 1.2 2.4 2 NiCd/NiMH 2.4 3 NiCd/NiMH 3.6 V BATT L1 4.7 H CLK/SEL LXP, ...

Page 10

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter FB REF 2.7A TYP CURRENT LIMIT OSC Figure 3. Simplified PWM Controller Block Diagram Synchronized PWM Operation The MAX1703 can be synchronized in PWM mode to a 200kHz ...

Page 11

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter The MAX1703 shuts down to reduce quiescent current to 1µA. During shutdown ( low-battery comparator, gain block, and all feedback and control circuitry are off. The boost converter’s out- ...

Page 12

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter Table 3. Component Selection Guide PRODUCTION INDUCTORS Sumida CDR125 Surface Mount Coilcraft DO3316 Through Hole Sumida RCH654 series __________________Design Procedure Setting the Output Voltages Set the output voltage between 2.5V and ...

Page 13

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter Bypass Capacitors A few ceramic bypass capacitors are required for proper operation. Bypass REF with a 0.22µF capacitor to GND. Connect a 0.22µF ceramic capacitor from OUT to GND. Each of ...

Page 14

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter LX POUT LDOs MAX1703 MAX8865/MAX8866 C RADIO Figure 8. Typical Phone Application 14 ______________________________________________________________________________________ ___________________Chip Information TRANSISTOR COUNT: 554 SUBSTRATE CONNECTED TO GND PA ...

Page 15

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ________________________________________________________Package Information ______________________________________________________________________________________ 15 ...

Page 16

High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter 16 ______________________________________________________________________________________ NOTES ...

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