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參數(shù)資料
| 型號： | MAX8597 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Dropout, Wide-Input-Voltage, Step-Down Controllers |
| 中文描述： | 低壓差、寬輸入電壓范圍、降壓型控制器 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 502K |
| 代理商： | MAX8597 |
General Description
The MAX8597/MAX8598/MAX8599 voltage-mode PWM
step-down controllers are designed to operate from a
4.5V to 28V input supply and generate output voltages
down to 0.6V. A proprietary switching algorithm stretch-
es the duty cycle to >99.5% for low-dropout design.
Unlike conventional step-down regulators using a p-
channel high-side MOSFET to achieve high duty cycle,
the MAX8597/MAX8598/MAX8599 drive n-channel
MOSFETs resulting in high efficiency and high-current-
capability designs.
The MAX8597 is available in a 20-pin thin QFN pack-
age and is designed for applications that use an analog
signal to control the output voltage with an adjustable
offset, such as DC fan-speed control. This is achieved
with an internal uncommitted operational amplifier. The
MAX8597 is also targeted for tracking output-voltage
applications for chipsets, ASIC and DSP cores, and I/O
supplies. The MAX8598/MAX8599 are available in a 16-
pin thin QFN package and do not have the uncommitted
operational amplifier, reference input, and reference out-
put, but offer an open-drain, power-OK output.
The MAX8597/MAX8598/MAX8599 allow startup with
prebias voltage on the output for applications where a
backup supply or a tracking device may charge the
output capacitor before the MAX8597/MAX8598/
MAX8599 are enabled. In addition, the MAX8599 fea-
tures output overvoltage protection.
These controllers also feature lossless high-side peak
inductor current sensing, adjustable current limit, and
hiccup-mode short-circuit protection. Switching fre-
quency is set with an external resistor from 200kHz to
1.4MHz. This wide frequency range combined with a
wide-bandwidth error amplifier enables the loop com-
pensation scheme to give the user ample flexibility to
optimize for cost, size, and efficiency.
Applications
Nonisolated Power Modules
Variable-Speed DC Fan Power Supplies
(MAX8597)
Tracking Power Supplies (MAX8597)
Chipset Power Supplies
Features
Low Dropout with >99.5% Duty Cycle
Lossless High-Side Current Limit
Wide 4.5V to 28V Input Range
Dynamic Output Voltage Adjustment with
Adjustable Offset (MAX8597)
Remote Voltage Sensing for Both Positive and
Negative Rails (MAX8597)
Tracking Output Through REFIN (MAX8597)
Adjustable Switching Frequency from 200kHz to
1.4MHz
Adjustable Soft-Start
Prebias Startup
Enable and Power-OK (MAX8598/MAX8599) for
Flexible Sequencing
25MHz Error Amplifier
Adjustable Hiccup Current Limit for Output
Short-Circuit Protection
Output Overvoltage Protection (MAX8599)
Small, Low-Profile Thin QFN Package
Ordering Information
M
Low-Dropout, Wide-Input-Voltage,
Step-Down Controllers
________________________________________________________________
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
1
A
2
R
3
G
4
S
5
F
15
L
14
D
13
B
12
P
11
D
6
COMP
7
EN
8
REFOUT
9
V+
10
VL
20
AIN+
19
AIN-
18
AOUT
17
FREQ
16
ILIM
MAX8597
THIN QFN
4mm x 4mm
TOP VIEW
Pin Configurations
19-3505; Rev 0; 11/04
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-PACKAGE
MAX8597
ETP+
-40°C to +85°C
20 Thin QFN 4mm x 4mm
(T2044-3)
MAX8598
ETE+
-40°C to +85°C
16 Thin QFN 4mm x 4mm
(T1644-4)
MAX8599
ETE+
-40°C to +85°C
16 Thin QFN 4mm x 4mm
(T1644-4)
+
Denotes lead-free package.
Pin Configurations continued at end of data sheet
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| MAX8597ETP | Low-Dropout, Wide-Input-Voltage, Step-Down Controllers |
| MAX8598ETE | Low-Dropout, Wide-Input-Voltage, Step-Down Controllers |
| MAX8599ETE | Low-Dropout, Wide-Input-Voltage, Step-Down Controllers |
| MAX8606 | USB/AC Adapter, Li+ Linear Battery Charger with Integrated 50mOHM Battery Switch in TDFN |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8597ETP+ | 功能描述:DC/DC 開關(guān)控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX8597ETP+T | 功能描述:DC/DC 開關(guān)控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX8597EVKIT | 制造商:Maxim Integrated Products 功能描述:LOW-DROPOUT WIDE-INPUT-VOLTAGE ST - Rail/Tube |
| MAX8598ETE | 制造商:Maxim Integrated Products 功能描述: |
| MAX8598ETE+ | 功能描述:DC/DC 開關(guān)控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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