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| 型号： | MAX1705EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.85A 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| 频率 - 开关： | 260kHz ~ 340kHz |
| 电流 - 输出： | 850mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
19-1198; Rev 1; 8/00
ATION
EVALU
AVAILA
KIT
BLE
1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
General Description
The MAX1705/MAX1706 are high-efficiency, low-noise,
step-up DC-DC converters with an auxiliary linear-
regulator output. These devices are intended for use in
battery-powered wireless applications. They use a syn-
chronous rectifier pulse-width-modulation (PWM) boost
topology to generate 2.5V to 5.5V outputs from battery
inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell.
The MAX1705 has an internal 1A n-channel MOSFET
switch. The MAX1706 has a 0.5A switch. Both devices
also have a built-in low-dropout linear regulator that
delivers up to 200mA.
With an internal synchronous rectifier, the MAX1705/
MAX1706 deliver 5% better efficiency than similar non-
synchronous converters. They also feature a pulse-
frequency-modulation (PFM) standby mode to improve
efficiency at light loads, and a 1μA shutdown mode. An
efficiency-enhancing track mode reduces the step-up
Features
? Up to 96% Efficiency
? 1.1V IN Guaranteed Startup
? Up to 850mA Output (MAX1705)
? Step-Up Output (2.5V to 5.5V Adjustable)
? Linear Regulator (1.25V to 5.0V Adjustable)
? PWM/PFM Synchronous-Rectified Topology
? 300kHz PWM Mode or Synchronizable
? 1μA Shutdown Mode
? Voltage Monitor
? Pushbutton On/Off Control
Ordering Information
DC-DC converter output to 300mV above the linear-reg-
ulator output.
Both devices come in a 16-pin QSOP package, which
occupies the same space as an 8-pin SO. Other features
PART
MAX1705 C/D
MAX1705EEE
MAX1706 C/D
TEMP RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
PIN-PACKAGE
Dice*
16 QSOP
Dice*
include two shutdown-control inputs for push-on/push-off
control, and an uncommitted comparator for use as a volt-
age monitor.
________________________Applications
MAX1706EEE -40°C to +85°C 16 QSOP
* Dice are tested at T A = +25°C, DC parameters only.
__________Typical Operating Circuit
Digital Cordless Phones
PCS Phones
Personal Communicators
Palmtop Computers
Handheld Instruments
Wireless Handsets
Two-Way Pagers
INPUT 0.7V TO 5.5V
Pin Configuration
LOW-BATTERY
LBP
LX
POUT
STEP-UP OUTPUT
DETECTION
OUT
TOP VIEW
LBP 1
LBN 2
16 POUT
15 ONA
ON/OFF CONTROL
MAX1705
LBO MAX1706
ONA
FB
LINEAR
REF 3
TRACK 4
GND 5
MAX1705
MAX1706
14 ONB
13 LX
12 PGND
HIGH
EFFICIENCY
LOW
NOISE
ONB
CLK/SEL
TRACK
LBN
LDO
FBLDO
REGULATOR
OUTPUT
OUT 6
FB 7
FBLDO 8
11 CLK/SEL
10 LBO
9
LDO
REF
GND PGND
QSOP
________________________________________________________________ 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.
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