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MAX8506, MAX8507, MAX8508
PWM Step-Down DC-DC Converters with 75mΩ Bypass FET for WCDMA and cdmaOne Handsets
PWM Step-Down DC-DC Converters with 75mΩ Bypass FET for WCDMA and cdmaOne™ Handsets
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Status
Active: In Production.
Description
The MAX8506/MAX8507/MAX8508 integrate a PWM step-down DC-DC regulator and a 75mΩ (typ) bypass FET to power the PA in WCDMA and cdmaOne™ cell phones. The supply voltage range is from 2.6V to 5.5V, and the guaranteed output current is 600mA. One megahertz PWM switching allows for small external components.
The MAX8506 and MAX8507 are dynamically controlled to provide varying output voltages from 0.4V to 3.4V. The MAX8508 is externally programmed for fixed 0.75V to 3.4V output. Digital logic enables a high-power (HP) bypass mode that connects the output directly to the battery for all versions. The MAX8506/MAX8507/MAX8508 are designed so the output settles in less than 30µs for a full-scale change in output voltage and load current.
The MAX8506/MAX8507/MAX8508 are offered in 16-pin 4mm x 4mm thin QFN packages (0.8mm max height).
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Data Sheet
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An evaluation kit is available: MAX8506EVKIT
Key Features
- Integrated 75mΩ (typ) Bypass FET
- 38mV Dropout at 600mA Load
- Up to 94% Efficiency
- Dynamically Adjustable Output from 0.4V to 3.4V (MAX8506, MAX8507)
- Externally Fixed Output from 0.75V to 3.4V (MAX8508)
- 1MHz Fixed-Frequency PWM Switching
- 600mA Guaranteed Output Current
- Shutdown Mode 0.1µA (typ)
- 16-Pin Thin QFN (4mm x 4mm, 0.8mm max Height)
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Applications/Uses
- WCDMA/NCDMA Cell Phones
- Wireless Modems
- Wireless PDAs, Palmtops, and Notebook Computers
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Key Specifications:
| Step-Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
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 |
| MAX8506 |
2.6 |
5.5 |
0.4 |
3.5 |
0.6 |
Dyn. REF In |
1 |
1000 |
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16.8 |
$2.05 @1k |
| MAX8507 |
0.4 |
Dyn. REF In |
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- |
| MAX8508 |
0.75 |
Resistor |
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$2.05 @1k |
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See All Step-Down Switching Regulators (288)
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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
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2918
Rev 1;
2004-02-03
This page last modified: 2007-08-16
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