MAX1880EUG+T datasheet, PDF - EEWORLD Datasheet

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MAX1880EUG+T: DescriptionIC DC-DC CONV QUAD LCD 24TSSOP; CategoryPower/power management The power supply circuit; File Size5MB，39 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX1880EUG+T Overview

IC DC-DC CONV QUAD LCD 24TSSOP

MAX1880EUG+T Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	TSSOP
package instruction	TSSOP, TSSOP24,.25
Contacts	24
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	1 week
Other features	ALSO CONTAINS CHARGE PUMP CONTROLLERS
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	5.5 V
Minimum input voltage	2.7 V
Nominal input voltage	3 V
JESD-30 code	R-PDSO-G24
JESD-609 code	e3
length	7.8 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	24
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	2.05 A
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP24,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	3/5 V
Certification status	Not Qualified
Maximum seat height	1.1 mm
Maximum supply current (Isup)	1 mA
surface mount	YES
Switch configuration	BOOST
Maximum switching frequency	1150 kHz
technology	BICMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm

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MAX1778/MAX1880–MAX1885

Quad-Output TFT LCD DC/DC

Converters with Buffer

General Description

The MAX1778/MAX1880–MAX1885 multiple-output

DC-DC converters provide the regulated voltages required

by active matrix thin-film transistor (TFT) liquid crystal

displays (LCD) in a low-profile TSSOP package. One

high-power step-up converter and two low-power charge

pumps convert the 2.7V to 5.5V input voltage into three

independent output voltages. A built-in linear regulator and

VCOM buffer complete the power-supply requirements.

The main step-up converter accurately generates an

externally set output voltage up to 13V that can supply the

display’s row/column drivers. The converter’s high switch-

ing frequency and current-mode PWM architecture provide

fast transient response and allow the use of small low-

profile inductors and ceramic capacitors. The low-power

BiCMOS control circuitry and internal 14V switch (0.35Ω

N-channel MOSFET) enable efficiencies up to 91%.

The dual low-power charge pumps (MAX1778/MAX1880/

MAX1881/MAX1882 only) independently regulate one

positive output (V

POS

) and one negative output (V

NEG

These low-power outputs use external diode and capaci-

tor stages (as many stages as required) to regulate output

voltages up to +40V and -40V. A unique control scheme

minimizes output ripple as well as capacitor sizes for both

charge pumps.

A resistor-programmable, 40mA, low-dropout linear

regulator (MAX1778/MAX1881/MAX1883/MAX1884 only)

provides preregulation or postregulation for any of the

supplies. For higher current applications, an external

transistor can be added. Additionally, the VCOM buffer

provides a high current output that is ideal for driving the

capacitive backplane of TFT LCD panels. The VCOM

buffer’s output voltage is preset with an internal 50%

resistive-divider or can be externally adjusted for other

voltages.

The MAX1778/MAX1880–MAX1885 are protected against

output undervoltage and thermal overload conditions by a

latched fault detection circuit that shuts down the device.

All devices are available in the ultrathin TSSOP package

(1.1mm max height).

Features

●

500kHz/1MHz Current-Mode PWM Step-Up

Regulator

• Up to +13V Main High-Power Output

±1% Accurate

• High Efficiency (91%)

●

Dual Regulated Charge-Pump Outputs (MAX1778/

MAX1880–MAX1882 only)

• Up to +40V Positive Charge-Pump Output

• Up to -40V Negative Charge-Pump Output

●

Low-Dropout 40mA Linear Regulator (MAX1778/

MAX1881/MAX1883/MAX1884 only)

• Up to +15V LDO Input

●

Optional Higher Current with External Transistor

●

2.7V to 5.5V Input Supply

●

Internal Supply Sequencing and Soft-Start

●

Power-Ready Output

●

Adjustable Fault-Detection Latch

●

Thermal Protection (+160°C)

● 0.1μA Shutdown Current

●

0.7mA IN Quiescent Current

●

Ultra-Small External Components

●

Thin TSSOP Package (1.1mm max height)

Ordering Information

PART

MAX1778EUG

MAX1778EUG+

MAX1880EUG

MAX1881EUG

MAX1882EUG

MAX1883EUP

MAX1884EUP

MAX1885EUP

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

24 TSSOP

20 TSSOP

+Denotes lead(Pb)-free/RoHS-compliant package.

Typical operating Circuit appears at end of data sheet.

Pin Configurations and Selector Guide appear at end of

data sheet.

Applications

●

TFT LCD Notebook Displays

●

TFT LCD Desktop Monitor Panels

19-1979; Rev 3; 4/15

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