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| 型号： | MAX8764ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL STP DWN HS 20-TQFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，笔记本电脑电源系统 |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 1.8V，2.5V，1 V ~ 5.5 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
19-3626; Rev 0; 3/05
High-Speed, Step-Down Controller with
Accurate Current Limit for Notebook Computers
General Description
The MAX8764 pulse-width modulation (PWM) controller
provides high efficiency, excellent transient response,
and high-DC output accuracy needed for stepping
down high-voltage batteries to generate low-voltage
CPU core or chipset/RAM supplies in notebook com-
puters.
Maxim ’s proprietary Quick-PWM ? quick-response,
constant-on-time PWM control scheme handles wide
input/output voltage ratios with ease and provides
100ns “instant-on” response to load transients while
maintaining a relatively constant switching frequency.
Efficiency is enhanced by an ability to drive very large
synchronous-rectifier MOSFETs. Accurate current sens-
ing to ensure reliable overload protection is available
using an external current-sense resistor in series with
the synchronous rectifier. Alternatively, the synchronous
rectifier itself can be used for less-accurate current
sensing at the lowest possible power dissipation. A
high-output impedance in shutdown eliminates nega-
tive output voltages, saving the cost of a Schottky diode
on the output.
Features
? Ultrahigh Efficiency
? Accurate Current-Limit Option
? Quick-PWM with 100ns Load-Step Response
? 1% V OUT Accuracy Over Line and Load
? 1.8V/2.5V Fixed or 1V to 5.5V Adjustable Output
Range
? 2V to 28V Battery Input Range
? 200/300/450/600kHz Switching Frequency
? Adjustable Overvoltage Protection
? Adjustable Undervoltage Protection
? 1.7ms Digital Soft-Start
? Drives Large Synchronous-Rectifier FETs
? 2V ±1% Reference Output
? Power-Good Window Comparator
Ordering Information
Single-stage buck conversion allows the MAX8764 to
directly step down high-voltage batteries for the highest
possible efficiency. Alternatively, two-stage conversion
PART
MAX8764EEP
MAX8764EEP+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 QSOP
20 QSOP
(stepping down the 5V system supply instead of the
battery) at a higher switching frequency allows the mini-
mum possible physical size.
The MAX8764 is intended for CPU core, chipset,
MAX8764ETP -40°C to +85°C
MAX8764ETP+ -40°C to +85°C
+ Denotes lead-free package.
20 Thin QFN
20 Thin QFN
DRAM, or other low-voltage supplies as low as 1V. It is
available in 20-pin QSOP and thin QFN packages and
Minimal Operating Circuit
includes both adjustable overvoltage and undervoltage
protection.
For a dual step-down PWM controller with accurate cur-
rent limit, refer to the MAX8743 data sheet. The
MAX1714/MAX1715 single/dual PWM controllers are
similar to the MAX8764, but do not use current-sense
resistors.
5V INPUT
V CC
SHDN
UVP
ILIM
V DD
V+
BST
BATTERY
4.5V TO 28V
Notebook Computers
CPU Core Supplies
Applications
DH
MAX8764
REF LX
DL
OUTPUT
2.5V
Chipset/RAM Supplies as Low as 1V
1.8V and 2.5V Supplies
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
PGOOD
LATCH
OVP
FB
CS
OUT
SKIP
GND
Pin Configurations appear at end of data sheet.
________________________________________________________________ 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.
1
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相关代理商/技术参数 |
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|---|---|
| MAX8765AETI+ | 功能描述:电池管理 Multichemistry Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8765AETI+T | 功能描述:电池管理 Multichemistry Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8765ETI | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8765ETI+ | 功能描述:电池管理 Multichemistry Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX8765ETI+T | 功能描述:电池管理 Multichemistry Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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