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MAX5080, MAX5081
1A, 40V, MAXPower Step-Down DC-DC Converters
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Status
Active: In Production.
Description
The MAX5080/MAX5081 are 250kHz PWM step-down
DC-DC converters with an on-chip, 0.3Ω high-side
switch. The input voltage range is 4.5V to 40V for the
MAX5080 and 7.5V to 40V for the MAX5081. The output
is adjustable from 1.23V to 32V and can deliver up to
1A of load current.
Both devices utilize a voltage-mode control scheme for
good noise immunity in the high-voltage switching environment
and offer external compensation allowing for
maximum flexibility with a wide selection of inductor values
and capacitor types. The switching frequency is
internally fixed at 250kHz and can be synchronized to
an external clock signal through the SYNC input. Light
load efficiency is improved by automatically switching
to a pulse-skip mode.
All devices include programmable undervoltage lockout
and soft-start. Protection features include cycle-by-cycle
current limit, hiccup-mode output short-circuit
protection, and thermal shutdown. Both devices are
available in a space-saving, high-power (2.7W), 16-pin
TQFN package and are rated for operation over the
-40°C to +125°C temperature range.
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Data Sheet
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An evaluation kit is available: MAX5080EVKIT
Key Features
- 4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081) Input Voltage Range
- 1A Output Current
- VOUT Range From 1.23V to 32V
- Internal High-Side Switch
- Fixed 250kHz Internal Oscillator
- Automatic Switchover to Pulse-Skip Mode at Light Loads
- External Frequency Synchronization
- Thermal Shutdown and Short-Circuit Protection
- Operates Over the -40°C to +125°C Temperature Range
- Space-Saving (5mm x 5mm) High-Power 16-Pin TQFN Package
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Applications/Uses
- Automotive
- Distributed Power
- FireWire® Power Supplies
- Industrial
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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 |
| MAX5080 |
4.5 |
40 |
1.23 |
32 |
1 |
1 |
Resistor |
1 |
250 |
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26 |
$3.49 @1k |
| MAX5081 |
7.5 |
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$3.49 @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
 Typical Operating Circuit
Application Notes
Reliability Reports
| 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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| MAX5080ATE
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655-3*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5080ATE+
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5080ATE+T
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5080ATE-T
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655-3*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5081ATE
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655-3*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5081ATE+
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5081ATE+T
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5081ATE-T
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Active |
TQFN;16 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0073 (PDF)
Use pkgcode/variation: T1655-3*
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-40°C to +125°C
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RoHS/Lead-Free: No
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
Similar Products by Application
Evaluation Kits
| MAX5080EVKIT |
Evaluation Kit for the MAX5080, MAX5081, MAX5082, MAX5083 |
Products with Similar Part Numbers
| MAX5080EVKIT |
Evaluation Kit for the MAX5080, MAX5081, MAX5082, MAX5083 |
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3656
Rev 1;
2007-02-21
This page last modified: 2007-02-21
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