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MAX8815A
1A, 97% Efficiency, 30µA Quiescent Current, Step-Up Converter with True Shutdown
Highest Efficiency, 1A Output Boost Converter
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Status
Active: In Production.
Description
The MAX8815A DC-DC step-up converter is a high-efficiency, low quiescent current, synchronous step-up converter with True Shutdown™ and inrush-current limiting. The MAX8815A generates any output voltage from 3.3V to 5V from a 2-cell NiMH/NiCd or a single-cell Li+/Li polymer battery.
The MAX8815A uses two modes of operation. The first mode of operation (normal) uses only 30µA (typ) quiescent current and allows the converter to switch only when needed at no load and light loads. Under moderate and heavy loads (typically above 90mA), the MAX8815A uses a fixed-frequency pulse-width modulation (PWM) technique. This mode allows maximum efficiency at light loads. The second mode of operation is a fixed-frequency forced-pulse-width modulation (FPWM) mode where the converter switches at a fixed frequency irrespective of the load. This mode allows for easy noise filtering and lower output ripple.
The MAX8815A has a preset 2.5A current limit, allowing 500mA load at 1.8V input and 1A load at 2.5V input when the output is set to 5V. Features include soft-start, which limits inrush current during startup, True Shutdown, and internal compensation. The MAX8815A is available in a compact 10-pin, 3mm x 3mm TDFN package.
The MAX8815A evaluation kit can help shorten the time required for system design.
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Data Sheet
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An evaluation kit is available: MAX8815AEVKIT
Key Features
- Up to 97% Efficiency with Internal Synchronous Rectifier
- Low 30µA Quiescent Current
- Guaranteed 500mA Output Current at VOUT = 5V from 1.8V Input
- Guaranteed 1A Output Current at 5V from 2.5V Input
- Low-Noise Constant Frequency Operation (FPWM Mode)
- 2MHz PWM Switching Frequency
- Preset (5V) or Adjustable Output
- Controlled Current in Soft-Start Limits Inrush Current
- True Shutdown
- Internal Compensation
- Overload/Short-Circuit Protection
- 0.1µA Shutdown Current
- Thermal Shutdown
- Compact 10-Pin, 3mm x 3mm TDFN Package
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Applications/Uses
- Cell Phones, PDAs, MP3 Players
- DSC and DVC
- Microprocessor/DSP Core Power
- PCMCIA Cards
- Portable Handheld Devices
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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 |
| MAX8815A |
1.2 |
5.5 |
1.265 |
5.5 |
1 |
1 |
Resistor |
1 |
2000 |
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9.6 |
$1.23 @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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Diagram
Typical Application Circuits
Application Notes
Reliability Reports
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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| MAX8815AETB+
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Active |
TDFN-EP;10 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0061 (PDF)
Use pkgcode/variation: T1033+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX8815AETB+T
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Active |
TDFN-EP;10 pin;9.6 mm²
Outline Drawing:21-0137 (PDF)
Land Pattern: 90-0061 (PDF)
Use pkgcode/variation: T1033+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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Information Index
Document Ref.: 19-4092
Rev 1;
2008-09-04
This page last modified: 2009-01-14
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