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MAX8625A
High-Efficiency, Seamless Transition, Step-Up/Down DC-DC Converter
Glitch-Free, Smooth Step-Up/Down Transition H-Bridge Converter
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Status
Active: In Production.
Description
The MAX8625A PWM step-up/down regulator is intended to power digital logic, hard disk drives, motors, and other loads in portable, battery-powered devices such as PDAs, cell phones, digital still cameras (DSCs), and MP3 players. The MAX8625A provides either a fixed 3.3V or adjustable output voltage (1.25V to 4V) at up to 0.8A from a 2.5V to 5.5V input. The MAX8625A utilizes a 2A peak current limit.
Maxim's H-bridge topology provides a seamless transition through all operating modes without the glitches commonly seen with other devices. Four internal MOSFETs (two switches and two synchronous rectifiers) with internal compensation minimize external components. An active-low SKIP input selects a low-noise, fixed-frequency PWM mode, or a high-efficiency skip mode where the converter automatically switches to PFM mode under light loads for best light-load efficiency. The internal oscillator operates at 1MHz to allow for a small external inductor and capacitors.
The MAX8625A features current-limit circuitry that shuts down the IC in the event of an output overload. In addition, soft-start circuitry reduces inrush current during startup. The IC also features True Shutdown™, which disconnects the output from the input when the IC is disabled. The MAX8625A is available in a 3mm x 3mm, 14-pin TDFN package.
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Data Sheet
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An evaluation kit is available: MAX8625AEVKIT
Key Features
- Four Internal MOSFET True H-Bridge Buck/Boost
- Glitch-Free, Buck-Boost Transitions
- Minimal Output Ripple Variation on Transitions
- Up to 92% Efficiency
- 37µA (typ) Quiescent Current in Skip Mode
- 2.5V to 5.5V Input Range
- Fixed 3.3V or Adjustable Output
- 1µA (max) Logic-Controlled Shutdown
- True Shutdown
- Output Overload Protection
- Internal Compensation
- Internal Soft-Start
- 1MHz Switching Frequency
- Thermal-Overload Protection
- Small 3mm x 3mm, 14-Pin TDFN Package
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Applications/Uses
- Battery-Powered Hard Disk Drive (HDD)
- DSCs and Camcorders
- MP3 Players and Cellular Phones
- PDAs and Smartphones
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Key Specifications:
| Step-Up/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 |
| MAX8625 |
2.5 |
5.5 |
1.25 |
4 |
3.3 |
0.8 |
0.8 |
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1 |
1000 |
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9.6 |
$2.63 @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
Application Notes
Reliability Reports
| Reliability Report: |
MAX8625.pdf |
| Show FIT data for: |
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX8625AETD+
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Active |
TDFN-EP;14 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0063 (PDF)
Use pkgcode/variation: T1433+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX8625AETD+T
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Active |
TDFN-EP;14 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0063 (PDF)
Use pkgcode/variation: T1433+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
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.
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Similar Products by Function
| MAX1760, MAX1760H |
0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter |
| MAX1763 |
1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter |
| MAX1556, MAX1556A, MAX1557 |
16µA IQ, 1.2A PWM Step-Down DC-DC Converters |
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Similar Products by Application
Evaluation Kits
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More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-1006
Rev 4;
2010-01-14
This page last modified: 2010-06-07
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