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MAX1513, MAX1514
TFT-LCD Power-Supply Controllers
TFT-LCD Power-Supply Controllers Provide Complete Power-Supply Solutions for Active-Matrix Thin-Film Transistor (TFT) Liquid-Crystal Displays (LCDs)
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Status
Active: In Production.
Description
The MAX1513/MAX1514 provide complete power-supply
solutions for active-matrix thin-film transistor (TFT)
liquid-crystal displays (LCDs). Both devices include a
high-performance step-up regulator controller, three linear-
regulator controllers, and an adjustable delay block
for startup sequencing. The MAX1513 includes an
additional linear-regulator controller and a high-performance
buffer amplifier. The MAX1513/MAX1514 can
operate from 2.7V to 5.5V input supplies and provide
overload protection with timer delay latch on all the regulated
outputs.
The step-up regulator controller drives an external N-channel
MOSFET to generate the regulated supply voltage
for the panel source-driver ICs. Its current-mode
control architecture provides fast transient response to
pulsed loads. The high switching frequency (up to
1.5MHz) allows the use of ultra-small inductors and
ceramic capacitors while achieving efficiencies over 85%
using lossless current sensing. The internal soft-start limits
the input surge current during startup.
The gate-on and gate-off linear-regulator controllers of
the MAX1513/MAX1514 provide regulated TFT gate-on
and gate-off supplies. The gate-on supply is activated
after an adjustable delay following the step-up regulator.
The logic linear-regulator controller can be used to create
a low-voltage logic supply. The gamma linear-regulator
controller of the MAX1513 can be used to generate a
gamma-correction reference supply or another generalpurpose
supply rail. The MAX1513's high-performance
buffer amplifier can drive the LCD backplane (VCOM)
or the gamma-correction divider string.
The MAX1513/MAX1514 are available in 4mm x 4mm
20-pin thin QFN packages with a maximum thickness of
0.8mm, suitable for ultra-thin LCD panel design.
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Data Sheet
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An evaluation kit is available: MAX1513EVKIT
Key Features
- 2.7V to 5.5V Input Supply Range
- Input-Supply Undervoltage Lockout
- Current-Mode Step-Up Controller
- Fast Transient Response to Pulsed Load
- High Efficiency
- Lossless Current Sensing
- 430kHz/750kHz/1.5MHz Switching Frequency
- Linear-Regulator Controllers for VGON, VGOFF
- Linear-Regulator Controller for Logic Supply
- High-Performance Buffer Amplifier (MAX1513 Only)
- Additional Linear-Regulator Controller (MAX1513 Only)
- Power-Up Sequence and VGON Delay Control
- VMAIN, VGON, VGOFF, VGAMMA Shutdown Control
- Timer-Delay Fault Latch for All Outputs
- Thermal-Overload Protection
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Applications/Uses
- Automotive Displays
- LCD Monitors and TVs
- Notebook Computer Displays
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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 |
| MAX1513 |
Step-Down |
| Output UVP | | Reset Output | | Shutdown |
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| Adj. Frequency | | Current Limit | | Fixed Freq./PWM | | Soft Start |
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TFT Bias |
2.7 |
5.5 |
2.7 |
50 |
0.5 |
0.5 |
1500 |
1 |
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16.8 |
$1.03 @1k |
| MAX1514 |
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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
Pin Configuration
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3047
Rev 0;
2004-01-27
This page last modified: 2009-10-12
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