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MAX1748

Features: Three Integrated DC-DC Converters1MHz Current-Mode PWM Boost Regulator Up to +13V Main High-Power Output ±1% Accuracy High Efficiency (93%)Dual Charge-Pump Outputs Up to +40V Positive Charge-Pump Output Down to -40V Negative Charge-Pump OutputInternal Supply SequencingInternal Power MOSF...

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SeekIC No. : 004409290 Detail

MAX1748: Features: Three Integrated DC-DC Converters1MHz Current-Mode PWM Boost Regulator Up to +13V Main High-Power Output ±1% Accuracy High Efficiency (93%)Dual Charge-Pump Outputs Up to +40V Positive Char...

MAX1748 Data Sheet

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Part Number:
MAX1748
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 Three Integrated DC-DC Converters
 1MHz Current-Mode PWM Boost Regulator
     Up to +13V Main High-Power Output ±1% Accuracy
     High Efficiency (93%)
 Dual Charge-Pump Outputs
     Up to +40V Positive Charge-Pump Output
     Down to -40V Negative Charge-Pump Output
 Internal Supply Sequencing
 Internal Power MOSFETs
 +2.7V to +5.5V Input Supply
 0.1µA Shutdown Current
 0.6mA Quiescent Current
 Internal Soft-Start
 Power-Ready Output
 Ultra-Small External Components
 Thin TSSOP Package (1.1mm max)


Application

TFT Active Matrix LCD Displays
Passive Matrix LCD Displays
PDAs
Digital Still Cameras
Camcorders


Pinout

Connection Diagram


Specifications

IN, SHDN, TGND to GND...........................................-0.3V to +6V
DRVN to GND..........................................-0.3V to (VSUPN + 0.3V)
DRVP to GND...........................................-0.3V to (VSUPP + 0.3V)
PGND to GND......................................................................±0.3V
RDY to GND ...........................................................-0.3V to +14V
LX, SUPP, SUPN to PGND .......................................-0.3V to +14V
INTG, REF, FB, FBN, FBP to GND...................-0.3V to (VIN + 0.3V)
Continuous Power Dissipation (TA = +70°C)
   16-Pin TSSOP (derate 9.4mW/°C above +70°C) ..........755mW
Operating Temperature Range
   MAX1748EUE ...................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX1748 triple-output DC-DC converter in a lowprofile TSSOP package provides the regulated voltages required by active matrix, thin-film transistor (TFT) liquid crystal displays (LCDs). One high-power DC-DC converter and two low-power charge pumps convert the +3.3V to +5V input supply voltage into three independent output voltages.

The primary high-power DC-DC converter generates a boosted output voltage (VMAIN) up to 13V that is regulated within ±1%. The low-power BiCMOS control circuitry and the low on-resistance (0.35Ω) of the integrated power MOSFET allows efficiency up to 93%. The 1MHz current-mode PWM architecture provides fast transient response and allows the use of ultra-small inductors and ceramic capacitors.

The dual charge pumps independently regulate one positive output (VPOS) and one negative output (VNEG). These low-power outputs use external diode and capacitor stages (as many stages as required) to regulate output voltages up to +40V and down to -40V. A proprietary regulation algorithm minimizes output ripple, as well as capacitor sizes for both charge pumps.

The MAX1748 is available in the ultra-thin TSSOP package (1.1mm max height).




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