Datasheet > MAX1570

MAX1570

更新时间： 2024-11-16 14:58:19

品牌	Logo	应用领域
亚德诺 - ADI		泵调节器
页数	文件大小	规格书
11页	742K
描述
白光LED电流调节器，带有1倍/1.5倍高效率电荷泵

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数据手册

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MAX1570 数据手册

19-2526; Rev 1; 4/05

White LED Current Regulator with 1x/1.5x

High-Efficiency Charge Pump

General Description

Features

The MAX1570 fractional charge pump drives up to five

white LEDs with regulated constant current for uniform

intensity. The MAX1570 maintains the highest possible

efficiency over the full 1-cell lithium-ion (Li+) battery

input voltage range by utilizing a 1x/1.5x fractional

charge pump and very-low-dropout current regulators.

The MAX1570 operates with 1MHz fixed-frequency

switching, allowing for tiny external components. The

regulation scheme is optimized to ensure low EMI and

low input ripple.

♦ Excellent 0.3% LED-to-LED Current Matching

♦ 30mA/LED Drive Capability

♦ Proprietary 1x/1.5x Modes for Ultra-High

Efficiency

♦ Low Input Ripple and EMI

♦ Eliminates Ballast Resistors

♦ Digital or PWM LED Dimming Control

♦ 0.1µA Shutdown Current

An external resistor sets the full-scale LED current,

while two digital inputs control on/off and select

between three levels of brightness. A pulse-width mod-

ulation (PWM) signal can also be used to modulate LED

brightness.

♦ 2.7V to 5.5V Supply Voltage Range

♦ Soft-Start Limits Inrush Current

♦ Thermal-Shutdown Protection

The MAX1570 is available in 16-pin 4mm ✕ 4mm Thin

QFN packaging (0.8mm max height).

♦ No External Inductor, Schottky, or Zener Diode

Required

♦ Tiny 16-Pin 4mm ✕ 4mm Thin QFN Package

Applications

White LED Backlighting

Cell Phones and Smart Phones

PDA and Palmtop Computers

Portable MP3 Players

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX1570ETE

-40°C to +85°C

16 Thin QFN

Digital Cameras and Camcorders

Pin Configuration

Typical Operating Circuit

TOP VIEW

1µF

C1P

C1N C2P

C2N

2.7V TO 5.5V

OUT

1x/1.5x

REGULATING CHARGE PUMP

IN 13

C2P 14

OUT 15

LED1

LED2

4.7µF

1µF

MAX1570

LED1

LED2

LED3

LED4

LED5

MAX1570

EN1

ON/OFF

AND

DIMMING

LED3

LED4

REFERENCE

AND

CONTROL

EN2

SET

LOW-DROPOUT

CURRENT

REGULATORS

C2N

SET

GND

PGND

THIN QFN

4mm x 4mm

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...11

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与MAX1570相关器件

型号	品牌	获取价格	描述	数据表
MAX1570ETE	MAXIM	获取价格	White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump
MAX1570ETE-T	MAXIM	获取价格	Analog Circuit, 1 Func, 4 X 4 MM, 0.80 MM HEIGHT, TQFN-16
MAX1570EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1570
MAX1572	MAXIM	获取价格	800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
MAX1572ETC	MAXIM	获取价格	800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
MAX1572ETC075	MAXIM	获取价格	800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
MAX1572ETC075+	MAXIM	获取价格	Switching Regulator, Current-mode, 1.65A, 2200kHz Switching Freq-Max, PQCC12, 4 X 4 MM, 0.
MAX1572ETC130	MAXIM	获取价格	800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
MAX1572ETC130+	MAXIM	获取价格	Switching Regulator, Current-mode, 1.65A, 2200kHz Switching Freq-Max, PQCC12, 4 X 4 MM, 0.
MAX1572ETC130-T	MAXIM	获取价格	Switching Regulator, Current-mode, 2.1A, 2200kHz Switching Freq-Max, BICMOS, 4 X 4 MM, 0.8

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