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MAX5025, MAX5026, MAX5027, MAX5028
500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
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Status
| Part Number |
Status |
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MAX5025
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This product is Not Recommended for New Designs. See Ordering Information for recommended replacements. |
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MAX5026
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Active: In Production. |
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MAX5027
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This product is Not Recommended for New Designs. See Ordering Information for recommended replacements. |
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MAX5028
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This product is Not Recommended for New Designs. See Ordering Information for recommended replacements. |
Description
The MAX5025–MAX5028 constant-frequency, pulse-width modulating (PWM), low-noise boost converters are intended for low-voltage systems that often need a locally generated high voltage. These devices are capable of generating low-noise, high output voltages required for varactor diode biasing in TV tuners, set-top boxes, and PCI cable modems. The MAX5025–MAX5028 operate from as low as 3V and switch at 500kHz.
The constant-frequency, current-mode PWM architecture provides for low output noise that is easy to filter. A 40V lateral DMOS device is used as the internal power switch, making the devices ideal for boost converters up to 36V. The MAX5025/MAX5026 adjustable versions require the use of external feedback resistors to set the output voltage. The MAX5027/MAX5028 offer a fixed 30V output. These devices are available in a small, 6-pin SOT23 package.
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Data Sheet
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An evaluation kit is available: MAX5026EVKIT
Key Features
- Input Voltage Range:
- 3V to 11V (MAX5026/MAX5028)
- 4.5V to 11V (MAX5025/MAX5027)
- Wide Output Voltage Range: VCC to 36V
- Output Power: 120mW (max)
- User-Adjustable Output Voltage with MAX5025/MAX5026 Using External Feedback Resistors
- Fixed 30V Output Voltage: MAX5027/MAX5028
- Internal 1.3Ω (typ), 40V Switch
- Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications
- 500kHz (typ) Switching Frequency
- 1µA (max) Shutdown Current
- Small, 6-Pin SOT23 Package
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Applications/Uses
- Avalanche Photodiode Biasing
- LCD Power Supply
- Low-Noise Varactor Diode Biasing
- PCI Cable Modem
- Set-Top Box Tuner Power Supply
- TV Tuner Power Supply
- Voice-Over-Cable
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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 |
| MAX5026 |
3 |
11 |
5 |
36 |
0.04 |
0.04 |
Resistor |
1 |
500 |
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9 |
$3.07 @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 Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-2239
Rev 2;
2010-02-12
This page last modified: 2010-02-12
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