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| 型号： | MAX1748EUE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC DC-DC CONV TRPL LCD 16-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 3 |
| 输出电压： | 2.7 V ~ 13 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 带卷 (TR) |
19-3430; Rev 0; 10/04
ATION
ILABLE
KIT
EVALU
AVA
General Description
The MAX1748/MAX8726 triple-output DC-DC converters
in a low-profile TSSOP package provide 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 1MHz DC-DC converter generates a boost-
ed output voltage (V MAIN ) up to 13V using ultra-small
inductors and ceramic capacitors. The low-power
BiCMOS control circuitry and the low on-resistance
(0.35 Ω ) of the integrated power MOSFET allows effi-
ciency up to 93%.
The dual charge pumps independently regulate one
positive output (V POS ) and one negative output (V NEG ).
These low-power outputs use external diode and
capacitor stages (as many stages as required) to regu-
late output voltages up to +40V and down to -40V. A
proprietary regulation algorithm minimizes output rip-
ple, as well as capacitor sizes for both charge pumps.
For both the MAX1748 and MAX8726, the supply
sequence is V MAIN first, V NEG next, and finally V POS .
The MAX1748 soft-starts each supply as soon as the
previous supply finishes. The MAX8726 adds a delay
Triple-Output TFT-LCD
DC-DC Converters
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)
Ordering Information
between the startups of V MAIN and V NEG and also
between V NEG and V POS .
The MAX1748/MAX8726 are available in the ultra-thin
PART
MAX1748 EUE
MAX8726 EUE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 TSSOP
TSSOP package (1.1mm max height).
TFT Active-Matrix LCD Displays
Passive-Matrix LCD Displays
Applications
TOP VIEW
Pin Configuration
PDAs
Digital Still Cameras
Camcorders
RDY 1
FB 2
INTG 3
16 TGND
15 LX
14 PGND
IN 4
GND 5
REF 6
FBP 7
MAX1748
MAX8726
13 SUPP
12 DRVP
11 SUPN
10 DRVN
FBN 8
TSSOP
9
SHDN
Typical Operating Circuit appears at end of data sheet.
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
________________________________________________________________ Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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