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MAX1832, MAX1833, MAX1834, MAX1835
High-Efficiency Step-Up Converters with Reverse Battery Protection
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Status
Active: In Production.
Description
The MAX1832-MAX1835 are high-efficiency step-up converters with complete reverse battery protection that protects the device and the load when the battery is reversed. They feature a built-in synchronous rectifier, which allows for over 90% efficiency and reduces size and cost by eliminating the need for an external Schottky diode.
These step-up converters operate from a +1.5V to +5.5V input voltage range and deliver up to 150mA of load current. The MAX1833EUT/MAX1835EUT (SOT devices) have a fixed 3.3V output voltage. The MAX1833ETT30 (TDFN device) has a fixed 3.0V output voltage. The MAX1832/MAX1834 have adjustable outputs from +2V to +5.5V. In shutdown, the MAX1832/MAX1833 connect the battery input to the voltage output, allowing the input battery to be used as a backup or real-time clock supply when the converter is off (see Selector Guide).
MAX183_EUT devices are available in a miniature 6-pin SOT23 package. The MAX1833ETT30 is available in a 3mm x 3mm thin DFN package. The MAX1832EVKIT is available to speed designs.
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Data Sheet
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An evaluation kit is available: MAX1833EVKIT
Key Features
- Reverse Battery Protection for DC-DC Converter and Load
- Up to 90% Efficiency
- No External Diode or FETs Needed
- Internal Synchronous Rectifier
- 4µA Quiescent Current
- <1µA Shutdown Supply Current
- +1.5V to +5.5V Input Voltage Range
- Accurate active-low SHDN Threshold for Low-Battery Cutoff
- BATT Connected to OUT in Shutdown for Backup Power (MAX1832/MAX1833)
- RST-bar Output (MAX1833/MAX1835)
- Fixed 3.3V/3.0V Output Voltage
- Adjustable Output Voltage (MAX1832/MAX1834)
- Up to 150mA Output Current
- Tiny 6-Pin SOT23 Package
- Tiny 6-Pin Thin QFN Package (MAX1833ETT30)
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Applications/Uses
- Battery Backup
- Cordless Phones
- Digital Cameras
- Handheld Instruments
- Local 3.3V to 5V Supplies
- Medical Diagnostic Equipment
- Pagers
- PC Cards
- Remote Wireless Transmitters
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Key Specifications:
| Step-Up Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Preset 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 |
| MAX1832 |
1.5 |
5.5 |
2 |
5.5 |
- |
0.15 |
0.15 |
Resistor |
1 |
500 |
|
9 |
$1.52 @1k |
| MAX1833 |
3.3 |
3.3 |
3.3 |
Preset |
|
$1.52 @1k |
| MAX1834 |
2 |
5.5 |
- |
Resistor |
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$1.52 @1k |
| MAX1835 |
3.3 |
3.3 |
3.3 |
Preset |
|
- |
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See All Step-Up Switching Regulators (95)
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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
Pin Configuration
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-1802
Rev 2;
2005-07-04
This page last modified: 2009-10-26
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