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參數資料
| 型號： | MAX1999 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| 中文描述： | 高效率、四路輸出、主電源控制器，用于筆記本電腦 |
| 文件頁數： | 1/32頁 |
| 文件大?。?/td> | 497K |
| 代理商： | MAX1999 |
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General Desc ription
The MAX1777/MAX1977/MAX1999 dual step-down,
switch-mode power-supply (SMPS) controllers generate
logic-supply voltages in battery-powered systems. The
MAX1777/MAX1977/MAX1999 include two pulse-width
modulation (PWM) controllers, adjustable from 2V to 5.5V
or fixed at 5V and 3.3V. These devices feature two linear
regulators providing 5V and 3.3V always-on outputs.
Each linear regulator provides up to 100mA output cur-
rent with automatic linear regulator bootstrapping to the
main SMPS outputs. The MAX1777/MAX1977/MAX1999
include on-board power-up sequencing, a power-good
(PGOOD) output, digital soft-start, and internal soft-stop
output discharge that prevents negative voltages on shut-
down.
Maxim’s proprietary Quick-PWM quick-response, con-
stant on-time PWM control scheme operates without
sense resistors and provides 100ns response to load
transients while maintaining a relatively constant switch-
ing frequency. The unique ultrasonic pulse-skipping
mode maintains the switching frequency above 25kHz,
which eliminates noise in audio applications. Other fea-
tures include pulse skipping, which maximizes efficiency
in light-load applications, and fixed-frequency PWM
mode, which reduces RF interference in sensitive appli-
cations.
The MAX1777 features a 200kHz/5V and 300kHz/3.3V
SMPS for highest efficiency, while the MAX1977 features
a 400kHz/5V and 500kHz/3.3V SMPS for “thin and light”
applications. The MAX1999 provides a pin-selectable
switching frequency, allowing either 200kHz/300kHz or
400kHz/500kHz operation of the 5V/3.3V SMPSs, respec-
tively. The MAX1777/MAX1977/MAX1999 are available in
28-pin QSOP packages and operate over the extended
temperature range (-40°C to +85°C). The MAX1777/
MAX1977/MAX1999 are available in lead-free packages.
Applic ations
Notebook and Subnotebook Computers
PDAs and Mobile Communication Devices
3- and 4-Cell Li+ Battery-Powered Devices
Features
No Current-Sense Resistor Needed (MAX1999)
Accurate Current Sense with Current-Sense
Resistor (MAX1777/MAX1977)
1.5% Output Voltage Accuracy
3.3V and 5V 100mA Bootstrapped Linear
Regulators
Internal Soft-Start and Soft-Stop Output
Discharge
Quick-PWM with 100ns Load Step Response
3.3V and 5V Fixed or Adjustable Outputs
(Dual Mode)
4.5V to 24V Input Voltage Range
Ultrasonic Pulse-Skipping Mode (25kHz min)
Power-Good (PGOOD) Signal
Overvoltage Protection Enable/Disable
Ordering Information
M
High-Effic ienc y, Quad Output, Main Power-
S upply Controllers for Notebook Computers
________________________________________________________________
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
19-2187; Rev 1; 9/04
PART
TEMP RANGE
PIN-
PACKAGE
5V/3V
SWITCHING
FREQUENCY
200kH z/300kH z
200kH z/300kH z
400kH z/500kH z
400kH z/500kH z
200kH z/300kH z or
400kH z/500kH z
MAX1777
EEI
MAX1777EEI+ -40°C to +85°C 28 QSOP
MAX1977
EEI
-40°C to +85°C 28 QSOP
MAX1977EEI+ -40°C to +85°C 28 QSOP
-40°C to +85°C 28 QSOP
MAX1999
EEI
-40°C to +85°C 28 QSOP
MAX1999EEI+ -40°C to +85°C 28 QSOP
200kH z/300kH z or
400kH z/500kH z
Quick-PWM and Dual Mode are trademarks of Maxim
Integrated Products, Inc.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
BST3
LX3
DH3
LDO3
DL3
GND
LX5
OUT3
OUT5
V+
DL5
LDO5
V
CC
DH5
BST5
TON
ILIM5
FB5
REF
FB3
ILIM3
ON5
ON3
PGOOD
N.C.
QSOP
TOP VIEW
MAX1999
SHDN
PRO
SKIP
Pin Configurations
Pin Configurations continued at end of data sheet.
+Denotes lead-free package.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1977EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1999EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1778 | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 85 |
| MAX1880 | Quad-Output TFT LCD DC-DC Converters with Buffer |
| MAX1881 | Quad-Output TFT LCD DC-DC Converters with Buffer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX19993ETX+ | 功能描述:上下轉換器 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19993ETX+T | 功能描述:上下轉換器 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19993EVKIT# | 功能描述:射頻開發(fā)工具 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MAX19994AETX+ | 功能描述:上下轉換器 High-Gain 1.2GHz to 2GHz Downconv RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19994AETX+T | 功能描述:上下轉換器 High-Gain 1.2GHz to 2GHz Downconv RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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