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MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller
Low-Cost, Versatile DC-DC Controller Operates from 4.5V to 28V Suitable for Multiple Applications
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Status
Active: In Production.
Description
The MAX15026 synchronous step-down controller operates from a 4.5V to 28V input voltage range and generates an adjustable output voltage from 85% of the input voltage down to 0.6V while supporting loads up to 25A. The device allows monotonic startup into a prebiased bus without discharging the output and features adaptive internal digital soft-start.
The MAX15026 offers the ability to adjust the switching frequency from 200kHz to 2MHz with an external resistor. The MAX15026's adaptive synchronous rectification eliminates the need for an external freewheeling Schottky diode. The device also utilizes the external low-side MOSFET's on-resistance as a current-sense element, eliminating the need for a current-sense resistor. This protects the DC-DC components from damage during output overloaded conditions or output short-circuit
faults without requiring a current-sense resistor. Hiccup-mode current limit reduces power dissipation during short-circuit conditions. The MAX15026 includes a power-good output and an enable input with precise turn-on/turn-off threshold, which can be used for input supply monitoring and for power sequencing.
Additional protection features include sink-mode current limit and thermal shutdown.
Sink-mode current limit prevents reverse inductor current from reaching dangerous levels when the device is sinking current from the output.
The MAX15026 is available in a space-saving and thermally enhanced 3mm x 3mm, 14-pin TDFN-EP package. The MAX15026 operates over the extended -40°C to +85°C and automotive -40°C to +125°C temperature ranges.
The MAX15026C is designed to provide additional margin for break-before-make times.
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Data Sheet
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An evaluation kit is available: MAX15026BEVKIT MAX15026CEVKIT
Key Features
- 4.5V to 28V or 5V ±10% Input Supply Range
- 0.6V to (0.85 x VIN) Adjustable Output
- Adjustable 200kHz to 2MHz Switching Frequency
- Ability to Start into a Prebiased Load
- Lossless, Cycle-by-Cycle Valley Mode Current Limit with Adjustable, Temperature-Compensated Threshold
- Sink-Mode Current-Limit Protection
- Adaptive Internal Digital Soft-Start
- ±1% Accurate Voltage Reference
- Internal Boost Diode
- Adaptive Synchronous Rectification Eliminates External Freewheeling Schottky Diode
- Hiccup-Mode Short-Circuit Protection
- Thermal Shutdown
- Power-Good Output and Enable Input for Power Sequencing
- ±5% Accurate Enable Input Threshold
- AEC-Q100 Qualified (MAX15026B)
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Applications/Uses
- DSP Power Supplies
- LCD TV Secondary Supplies
- Points-of-Load Regulators
- Power Modules
- Set-Top Boxes
- Switches/Routers
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Key Specifications:
| Step-Down 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 |
| MAX15026 |
4.5 |
28 |
0.6 |
28 |
15 |
15 |
Resistor |
1 |
2000 |
|
9.6 |
$1.59 @1k |
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See All Step-Down Switching Regulators (284)
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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
Functional Diagram
More Information
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Information Index
Document Ref.: 19-4108
Rev 3;
2011-04-25
This page last modified: 2011-04-25
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