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MAX1714, MAX1714A, MAX1714B
High-Speed Step-Down Controller for Notebook Computers
Low-Cost, Ultra-Fast, 1%-Accurate Controllers Power Next-Generation Notebook CPU Core and I/O
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Status
Active: In Production.
Description
The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chip-set/RAM supplies in notebook computers.
Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.
The MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.
Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.
The MAX1714 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715 data sheet.
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Data Sheet
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An evaluation kit is available: MAX1714AEVKIT MAX1714BEVKIT
Key Features
- Ultra-High Efficiency
- No Current-Sense Resistor (Lossless ILIMIT)
- Quick-PWM with 100ns Load-Step Response
- 1% VOUT Accuracy Over Line and Load
- 2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
- 2V to 28V Battery Input Range
- 200/300/450/600kHz Switching Frequency
- Overvoltage Protection (MAX1714A)
- Undervoltage Protection
- 1.7ms Digital Soft-Start
- Drives Large Synchronous-Rectifier FETs
- 2V ±1% Reference Output
- Power-Good Indicator
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Applications/Uses
- 1.8V and 2.5V I/O Supplies
- Chipset/RAM Supplies as Low as 1V
- CPU Core Supplies
- Notebook Computers
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Key Specifications:
| Step-Down Switching Regulators |
| Part Number |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Preset 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 |
| MAX1714A |
2 |
28 |
1 |
5.5 |
|
8 |
8 |
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1 |
600 |
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54.2 |
$2.62 @1k |
| MAX1714B |
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$2.62 @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
 Minimal Operating Circuit
Application Notes
Reliability Reports
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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| MAX1714AEEP
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Active |
QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1714AEEP+
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Active |
QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1714AEEP+T
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Active |
QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1714AEEP-T
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Active |
QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1714BEEE
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Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1714BEEE+
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Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1714BEEE+T
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Active |
QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1714BEEE-T
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Active |
QSOP;16 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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Notes and Comments
Power Good Indicator, 2V ±1% Reference Output, Drives Large Synchronous Rectifier FETs
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More Information
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Information Index
Document Ref.: 19-1536
Rev 2;
2005-09-16
This page last modified: 2007-06-04
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