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參數資料
| 型號： | MAX1993 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages |
| 中文描述： | Quick-PWM降壓型控制器，帶有電感飽和保護和動態輸出電壓 |
| 文件頁數： | 1/36頁 |
| 文件大小： | 543K |
| 代理商： | MAX1993 |
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General Desc ription
The MAX1992/MAX1993 pulse-width modulation (PWM)
controllers provide high-efficiency, excellent transient
response, and high DC output accuracy. The devices
step down high-voltage batteries to generate low-
voltage CPU core or chipset/RAM supplies in notebook
computers.
Maxim’s proprietary Quick-PWM quick-response, con-
stant 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 the ability to drive very large synchronous-
rectifier MOSFETs. Current sensing to ensure reliable
overload and inductor saturation protection is available
using an external current-sense resistor in series with the
output. Alternatively, the controller can sense the current
across the synchronous rectifier alone or use lossless
inductor sensing for lowest power dissipation.
Single-stage buck conversion allows the MAX1992/
MAX1993 to directly step down high-voltage batteries for
the highest possible efficiency. Alternatively, two-stage
conversion (stepping down from another system supply
rail instead of the battery) at the maximum switching fre-
quency allows the minimum possible physical size.
The MAX1992 powers the CPU core, chipset, DRAM, or
other supply rails as low as 0.7V. The MAX1993 powers
chipsets and graphics processor cores, which require
dynamically adjustable output voltages. The MAX1993
provides a tracking input that can be used for active ter-
mination buses. The MAX1992/MAX1993 are available in
a 24-pin thin QFN package with optional overvoltage and
undervoltage protection.
For dual step-down PWM controllers with inductor satu-
ration protection, external reference input voltage, and
dynamically selectable output voltages, refer to the
MAX1540/MAX1541 data sheet.
Applic ations
Notebook Computers
Core/IO Supplies as Low as 0.7V
1.8V and 2.5V Supplies
DDR Memory Termination (MAX1993)
Active Termination Buses (MAX1993)
CPU/Chipset/GPU with Dynamic Voltage Cores
(MAX1993)
Features
o
Inductor Saturation Protection
o
Accurate Current Limit
o
Ultra-High Efficiency
o
Quick-PWM with 100ns Load-Step Response
o
MAX1992
1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable
Output Range
o
MAX1993
External Reference Input
Dynamically Selectable Output Voltage
(0.7V to 5.5V)
Optional Power-Good and Fault Blanking
During Transitions
o
±1% V
OUT
Accuracy Over Line and Load
o
2V to 28V Battery Input Range (V
IN
)
o
200/300/450/600kHz Switching Frequency
o
Overvoltage/Undervoltage Protection Option
o
1.7ms Digital Soft-Start
o
Drives Large Synchronous Rectifier FETs
o
2V ±0.7% Reference Output
o
Power-Good Window Comparator
M
Quick-PWM Step-Down Controllers with Inductor
Saturation Protection and Dynamic Output Voltages
________________________________________________________________
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
24
23
22
21
20
1
2
3
4
5
7
8
9
10
11
14
15
16
17
18
24-PIN THIN QFN
4mm x 4mm
TOP VIEW
MAX1992
DL
TON
N.C.
LSAT
PGOOD
ILIM
6
REF
BST
DH
V+
13
SKIP
LX
C
O
12
C
F
N
N
O
S
V
C
A
P
19
V
D
Pin Configurations
19-2661; Rev 0; 10/02
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
TEMP RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-PACKAGE
24 Thin QFN 4mm
×
4mm
24 Thin QFN 4mm
×
4mm
MAX1992
ETG
MAX1993
ETG
Pin Configurations continued at end of data sheet.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1993ETG | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1993ETG+ | 功能描述:電壓模式 PWM 控制器 Step-Down w/Inductor RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1993ETG+T | 功能描述:電壓模式 PWM 控制器 Step-Down w/Inductor RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1993ETG+TG40 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1993ETG-T | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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