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| 型号： | MAX797HESE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 混合物 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 96% |
| 电源电压： | 4.5 V ~ 40 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
19-1239; Rev 0; 7/97
High-Voltage, Step-Down Controller with
Synchronous Rectifier for CPU Power
_______________General Description
The MAX797H high-performance, step-down DC-DC
converter provides main CPU power in battery-powered
systems. A 40V rating on the power stage’s input allows
operation with high-cell-count batteries and a wide
range of AC adaptors. This buck controller achieves
96% efficiency by using synchronous rectification and
Maxim ’s proprietary Idle Mode? control scheme to
extend battery life at full-load (up to 10A) and no-load
outputs. Excellent dynamic response corrects output tran-
sients caused by the latest dynamic-clock CPUs within five
300kHz clock cycles. Unique bootstrap circuitry drives
inexpensive N -channel MOSFETs, reducing system cost
and eliminating the crowbar switching currents found in
some PMOS/NMOS switch designs.
The MAX797H has a logic-controlled and synchronizable
fixed-frequency, pulse-width-modulating (PWM) operating
mode, which reduces noise and RF interference in sensi -
tive mobile-communications and pen-entry applications.
The SKIP override input allows automatic switchover to
idle-mode operation (for high-efficiency pulse skipping) at
light loads, or forces fixed-frequency mode for lowest noise
at all loads. The MAX797H is pin compatible with the popu-
lar MAX797, but has a higher input voltage range.
The MAX797H comes in a 16-pin narrow SO package.
____________________________Features
o 96% Efficiency
o Up to 40V Power Input
o 2.5V to 6V Adjustable Output
o Preset 3.3V and 5V Outputs (at up to 10A)
o 5V Linear-Regulator Output
o Precision 2.505V Reference Output
o Automatic Bootstrap Circuit
o 150kHz/300kHz Fixed-Frequency PWM Operation
o Programmable Soft-Start
o 375μA Quiescent Current (V IN = 12V, V OUT = 5V)
o 1μA Shutdown Current
______________Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX797HESE -40°C to +85°C 16 Narrow SO
__________Typical Operating Circuit
________________________Applications
Notebook and Subnotebook Computers
Industrial Controls
__________________Pin Configuration
+4.5V TO +30V
SUPPLY
INPUT
V+
SHDN
VL
DH
+4V TO +40V
POWER INPUT
+3.3V
TOP VIEW
SS 1
SKIP 2
16 DH
15 LX
SS
MAX797H BST
LX
OUTPUT
REF 3
GND 4
SYNC 5
SHDN 6
FB 7
MAX797H
14 BST
13 DL
12 PGND
11 VL
10 V+
REF
SYNC
DL
PGND
CSH
CSH 8
9
CSL
GND
CSL
SO
Idle Mode is a trademark of Maxim Integrated Products.
SKIP
FB
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
For small orders, phone 408-737-7600 ext. 3468.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX797MJE | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX797MSA/PR | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX797MSE/R70874 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX798ESE | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX798ESE+ | 功能描述:直流/直流开关转换器 Step-Down Controller for CPU Power RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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