|
MAX1775
Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers
Dual-Output Step-Down Converter For PDA's and Palmtop Computers
|
Status
Active: In Production.
Description
The MAX1775 dual, step-down DC-DC converter generates both the main (+3.3V at over 2A) and core (+1.8V at up to 1.5A) supplies for a complete power solution for PDAs, subnotebooks, and other hand-held devices. The main output is adjustable from +1.25V to +5.5V. The core output is adjustable from 1V to 5V. Both switching converters operate at up to 1.25MHz for small external components and use synchronous rectifiers to achieve efficiencies up to 95%. Operation with up to 100% duty cycle provides the lowest possible dropout voltage to extend useful battery life.
The MAX1775 accepts inputs from +2.7V up to +28V, allowing use with many popular battery configurations as well as AC-DC wall adapters. Digital soft-start reduces battery current surges at power-up. Both the main and core converters have separate shutdown inputs. The MAX1775 comes in a small 16-pin QSOP package.
The MAX1775 evaluation kit is available to help reduce design time.
|
|
Data Sheet
|
An evaluation kit is available: MAX1775EVKIT
Key Features
- Dual, High-Efficiency, Synchronous Rectified Step-Down Converter
- Main Power
- Adjustable from +1.25V to +5.5V
- Over 2A Load Current
- Up to 95% Efficiency
- Core Power
- Adjustable from 1V to 5V
- Internal Switches
- Up to 1.5A Load Current
- Up to 92% Efficiency
- 100% (max) Duty Cycle
- Up to 1.25MHz Switching Frequency
- Input Voltage Range from +2.7V to +28V
- 170µA Quiescent Current
- 5µA Shutdown Current
- Digital Soft-Start
- Independent Shutdown Inputs
|
|
Applications/Uses
- Handheld Computers
- Internet Access Tablets
- PDAs
- POS Terminals
- Subnotebooks
|
|
|
|
Key Specifications:
| Step-Down 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 |
| MAX1775 |
2.7 |
28 |
1 |
5.5 |
|
2 |
2 |
|
2 |
1250 |
|
30.9 |
$3.05 @1k |
|
See All Step-Down Switching Regulators (284)
|
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.
|
|
Diagram
 Typical Operating Circuit
Reliability Reports
Software/Models
Ordering Information
|
Part Number
|
Free
Sample |
Buy |
Status
|
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
|
Temp |
RoHS/Lead-Free?
Materials Analysis
|
| MAX1775EEE
|
|
|
Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16-5*
|
-40°C to +85°C
|
RoHS/Lead-Free: No
Materials Analysis |
| MAX1775EEE+
|
|
|
Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+5*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1775EEE+T
|
|
|
Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+5*
|
-40°C to +85°C
|
RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1775EEE-T
|
|
|
Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16-5*
|
-40°C to +85°C
|
RoHS/Lead-Free: No
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
|
Similar Products by Function
| MAX1774 |
Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover |
|
|
Evaluation Kits
Products with Similar Part Numbers
Didn't Find What You Need?
Information Index
Document Ref.: 19-1811
Rev 2;
2010-01-12
This page last modified: 2010-03-04
|
Download
E-Mail