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MAX17014A
Low-Cost Multiple-Output Power Supply for LCD TVs
Multiple-Output Power-Supply Controller Generates All the Supply Rails for TFT-LCD TV Applications
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Status
Active: In Production.
Description
The MAX17014A multiple-output power-supply controller generates all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in TVs and monitors operating from a regulated 12V input. It includes a step-down and a step-up regulator, a positive and a negative charge pump, two operational amplifiers, and a Dual Mode™ logic-controlled high-voltage switch control block. The MAX17014A can operate from 8V to 16.5V input voltages and is optimized for LCD TV panel and LCD monitor applications running directly from 12V supplies.
The step-up and step-down regulators feature internal power MOSFETs and high-frequency operation allowing the use of small inductors and capacitors, resulting in a compact solution. Both switching regulators use fixed-frequency current-mode control architectures, providing fast load-transient response and easy compensation. A current-limit function for internal switches and output-fault shutdown protect the step-up and step-down power supplies against fault conditions. The MAX17014A provides soft-start functions to limit inrush current during startup. The MAX17014A provides adjustable power-up timing.
The positive and negative charge-pump regulators provide TFT gate driver supply voltages. Both output voltages can be adjusted with external resistive voltage-dividers. The switch control block allows the manipulation of the positive TFT gate driver voltage.
The MAX17014A includes two high-current operational amplifiers designed to drive the LCD backplane (VCOM). The amplifier features high output current (±150mA), fast slew rate (100V/µs), wide bandwidth (20MHz), and rail-to-rail inputs and outputs. A series p-channel MOSFET is integrated to sequence power to AVDD after the MAX17014A has proceeded through normal startup, and provides True Shutdown™.
The MAX17014A is available in a small (7mm x 7mm), low-profile (0.8mm), 48-pin thin QFN package and operates over a -40°C to +85°C temperature range.
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Data Sheet
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Key Features
- Optimized for 10.8V to 13.2V Input Supply
- 8V to 16.5V Input Supply Range
- Selectable Frequency (600kHz/1.2MHz)
- Current-Mode Step-Up Regulator
- Built-In 20V, 3.7A, 110mΩ n-Channel MOSFET
- High-Accuracy Output Voltage (1%)
- True Shutdown
- Fast Load-Transient Response
- High Efficiency
- 3ms Internal Soft-Start
- Current-Mode Step-Down Regulator
- Built-In 20V, 2.5A, 120mΩ n-Channel MOSFET
- Fast Load-Transient Response
- Adjustable Output Voltage Down to 1.25V
- Skip Mode at Light Load
- High Efficiency
- 3ms Internal Soft-Start
- Adjustable Positive and Negative Charge-Pump Regulators
- Soft-Start and Timer-Delay Fault Latch for All Outputs
- Logic-Controlled High-Voltage Integrated Switches with Adjustable Delay
- Two High-Speed Operational Amplifiers
- ±150mA Short-Circuit Current
- 100V/µs Slew Rate
- 20MHz, -3dB Bandwidth
- 120mΩ p-Channel FET for AVDD Sequencing
- Input Undervoltage Lockout and Thermal-Overload Protection
- 48-Pin, 7mm x 7mm Thin QFN Package
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Applications/Uses
- LCD Monitor Panels
- LCD TV Panels
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Key Specifications:
| Multifunction PMICs |
| Part Number |
Primary Topology |
Monitor/Control Features |
DC-DC/Power Features |
LCD/LED/Flash/CCD Features |
VIN
(V) |
VIN
(V) |
VOUT
(V) |
VOUT
(V) |
Max. IOUT
(A) |
Max. IOUT
(A) |
Oper. Freq.
(kHz) |
Inverting Outputs |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| min |
max |
min |
max |
≥ |
≤ |
max w/pins |
See Notes |
| MAX17014A |
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| Adj. Frequency | | Current Limit | | Fixed Freq./PWM | | Internal Pwr. FETs | | Soft Start |
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|
8 |
16.5 |
1.25 |
20 |
2.5 |
2.5 |
1200 |
1 |
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50.4 |
$2.41 @1k |
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See All Multifunction PMICs (96)
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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 Simplified Circuit
Product Guides
Reliability Reports
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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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| MAX17014AETM+
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Active |
TQFN;48 pin;50.4 mm²
Outline Drawing:21-0144 (PDF)
Land Pattern: 90-0129 (PDF)
Use pkgcode/variation: T4877+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX17014AETM+T
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Active |
TQFN;48 pin;50.4 mm²
Outline Drawing:21-0144 (PDF)
Land Pattern: 90-0129 (PDF)
Use pkgcode/variation: T4877+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
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.: 19-4192
Rev 0;
2008-09-08
This page last modified: 2009-07-29
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