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MAX1522, MAX1523, MAX1524
Simple SOT23 Boost Controllers
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Status
Active: In Production.
Description
The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications.
These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.
The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.
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Data Sheet
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An evaluation kit is available: MAX1522EVKIT, MAX1523EVKIT, MAX1524EVKIT
Key Features
- Simple, Flexible Application Circuit
- 2-Cell NiMH or Alkaline Operation (MAX1524)
- Low Quiescent Current (25µA typ)
- Output Fault Protection and Soft-Start
- High Efficiency Over 1000:1 IOUT Range
- Pin-Selectable Maximum Duty Factor
- Micropower Shutdown Mode
- Small 6-Pin SOT23 Package
- No Current-Sense Resistor
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Applications/Uses
- Industrial +24V and +28V Power Supplies
- LCD Bias Supplies
- Low-Cost Battery-Powered Applications
- Low-Cost, High-Current, or High-Voltage Boost Conversion
- Low-Cost, Multi-Output Flyback Converters
- SEPIC Converters
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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 |
| MAX1522 |
2.5 |
5.5 |
2.5 |
100 |
1 |
1 |
Resistor |
1 |
1000 |
|
9 |
$1.07 @1k |
| MAX1523 |
2.5 |
100 |
0.95 |
0.95 |
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$1.61 @1k |
| MAX1524 |
1.5 |
5 |
0.95 |
0.95 |
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$1.07 @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
Application Notes
Reliability Reports
| Reliability Report: |
MAX1523.pdf |
| 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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| MAX1522EUT+
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1522EUT+T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1522EUT-T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1523EUT+
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1523EUT+T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1523EUT-T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1524EUT
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1524EUT+T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1524EUT-T
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Active |
SOT;6 pin;9 mm²
Outline Drawing:21-0058 (PDF)
Land Pattern: 90-0175 (PDF)
Use pkgcode/variation: U6SN-1*
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-40°C to +85°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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Information Index
Document Ref.: 19-1926
Rev 1;
2010-08-17
This page last modified: 2011-01-10
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