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MAX8513, MAX8514
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset
Complete Triple-Output xDSL Power Supplies for Modems, Routers, and Gateways Save Cost and Reduce Noise
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Status
Active: In Production.
Description
The MAX8513/MAX8514 integrate a voltage-mode
PWM step-down DC-DC controller and two LDO controllers,
a voltage monitor, and a power-on reset for the
lowest-cost power-supply and monitoring solution for
xDSL modems, routers, gateways, and set-top boxes.
The DC-DC controller switching frequency can be set
with an external resistor from 300kHz to 1.4MHz, to allow
for the optimization of cost, size, and efficiency. For noisesensitive
applications, the DC-DC controller can also be
synchronized to an external clock, minimizing noise interference.
Operation above 1.1MHz reduces noise for high
data-rate xDSL applications. An adjustable soft-start and
adjustable foldback current limit provide reliable startup
and fault protection. The DC-DC controller output voltage
can be set externally to a voltage from 1.25V to 5.5V.
Current limiting is accomplished by inductor current sensing
for improved efficiency, or by an external sense resistor
for better accuracy.
The MAX8513/MAX8514s' first LDO controller is
designed to provide a low-cost, high-current regulated
output from 0.8V to 5.5V using an N-channel MOSFET or
a low-current output using a low-cost NPN transistor. The
MAX8513's second regulator can be used to generate
0.8V to 27V output with a low-cost PNP transistor. Both LDO regulators can operate either from the DC-DC controller output or from a higher voltage derived with a flyback overwinding on the DC-DC converter inductor. The MAX8514's second LDO regulator is designed to provide a negative output with an NPN transistor.
A sequence input allows the outputs to either power up together, or for the DC-DC regulator to power up first and each LDO controller to power up in sequence. An input power-fail output (active-low PFO) is provided for input power-fail warning, such as in dying-gasp applications. A power-on reset circuit with a 140ms delay is also included to indicate when all outputs have achieved regulation and stabilized.
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Data Sheet
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An evaluation kit is available: MAX8513EVKIT
Key Features
- Low-Cost DC-DC Controller with Two LDOs
- Wide Input Range: 4.5V to 28V
- 300kHz to 1.4MHz Adjustable Switching Frequency
- Low Noise for High Data-Rate xDSL Applications
- Synchronizable to External Clock
- Adjustable Soft-Start
- Lossless Adjustable Foldback Current Limit
- Power-On Reset with 140ms Delay
- Adjustable Input Power-Fail Warning for Dying Gasp
- Selectable Output-Voltage Sequencing or Output-Voltage Tracking
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Applications/Uses
- Automotive Dashboard Electronics
- Set-Top Boxes
- Wireless Routers
- xDSL, Cable, ISDN Modems, and 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 |
| MAX8513 |
4.5 |
28 |
0.8 |
27 |
4 |
4 |
Resistor |
1 |
1400 |
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61.9 |
$1.79 @1k |
| MAX8514 |
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- |
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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
Pin Configuration
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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| MAX8513EEI
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Active |
QSOP;28 pin;61.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0173 (PDF)
Use pkgcode/variation: E28-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX8513EEI+
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Active |
QSOP;28 pin;61.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0173 (PDF)
Use pkgcode/variation: E28+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX8513EEI+T
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Active |
QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX8513EEI-T
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Active |
QSOP;28 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX8514AEI
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Active |
QSOP;28 pin;61.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0173 (PDF)
Use pkgcode/variation: E28-1*
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-40°C to +125°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX8514AEI-T
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Active |
QSOP;
Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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| MAX8514EEI
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Active |
QSOP;28 pin;61.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0173 (PDF)
Use pkgcode/variation: E28-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX8514EEI-T
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Active |
QSOP;28 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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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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More Information
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Information Index
Document Ref.: 19-3178
Rev 0;
2004-05-15
This page last modified: 2010-02-25
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