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MAX1700, MAX1701
1 Cell to 3 Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters
Compact, High-Efficiency, Low-Noise Step-Up Converter with a Gain-Block
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Status
Active: In Production.
Description
The MAX1700/MAX1701 are high-efficiency, low-noise, step-up DC-DC converters intended for use in battery-powered wireless applications. They use a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs such as one to three NiCd/NiMH cells or one Li-Ion cell. Both devices have an internal 1A, 130mΩ N-channel MOSFET switch and a 250mΩ P-channel synchronous rectifier.
With their internal synchronous rectifier, the MAX1700/
MAX1701 deliver 5% better efficiency than similar nonsynchronous converters. They also feature a pulse-frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 3µA shutdown mode.
The MAX1700/MAX1701 come in 16-pin QSOP packages (which occupy the same space as an 8-pin SO). The MAX1701 includes two comparators to generate power-good and low-battery warning outputs. It also contains a gain block that can be used to build a linear regulator using an external P-channel pass device.
For higher-power outputs, refer to the MAX1703. For dual outputs (step-up and linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849.
The MAX1701 evaluation kit is available to speed design time.
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Data Sheet
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An evaluation kit is available: MAX1700EVKIT, MAX1701EVKIT
Key Features
- Up to 96% Efficiency
- 1.1 VIN Guaranteed Start-Up
- 0.7V to 5.5V Input Range
- Up to 800mA Output
- Step-Up Output (adjustable from 2.5V to 5.5V)
- PWM/PFM Synchronous-Rectified Topology
- External Clock or Internal 300kHz Oscillator
- 3µA Logic-Controlled Shutdown
- Power-Good Output (MAX1701)
- Low-Battery Comparator (MAX1701)
- Uncommitted Gain Block (MAX1701)
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Applications/Uses
- Digital Cordless Phones
- Handheld Instruments (PDAs, Palmtops)
- Palmtop Computers
- PCS Phones
- Personal Communicators
- Two-Way Paging
- Wireless Handsets
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Key Specifications:
| Step-Up Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
Output Adjust. Method |
DC-DC Outputs |
Oper. Freq.
(kHz) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX1700 |
0.7 |
5.5 |
2.2 |
5.5 |
0.8 |
0.8 |
Resistor |
1 |
400 |
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30.9 |
- |
| MAX1701 |
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$2.96 @1k |
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See All Step-Up Switching Regulators (91)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Step-Up/Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
Output Adjust. Method |
DC-DC Outputs |
Alternate Topology |
Oper. Freq.
(kHz) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX1701 |
0.7 |
5.5 |
2.2 |
5.5 |
0.8 |
0.8 |
Resistor |
1 |
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400 |
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30.9 |
$2.96 @1k |
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See All Step-Up/Down Switching Regulators (9)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
Synchronous Rectifier, Up to 800mA Output Current
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-4759
Rev 1;
1999-01-01
This page last modified: 2007-06-01
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