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参数资料
| 型号： | MAX1638EAG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC STEP-DWN CTRLR HI-SPD 24-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 应用： | 控制器，Intel Pentium? II |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 带卷 (TR) |
High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
______________________________________________________________Pin Description
PIN
1
2
3
4
5, 6, 7
8
9
10
11
12
13
14
15
16, 17
18
19
20
21
22
23
24
NAME
BST
PWROK
CSL
CSH
D2, D1,
D0
LG
V CC
REF
AGND
FB
CC1
CC2
FREQ
D4, D3
NDRV
PDRV
V DD
DL
PGND
LX
DH
FUNCTION
Boost-Capacitor Bypass for High-Side MOSFET Gate Drive. Connect a 0.1μF capacitor and low-leak-
age Schottky diode as a bootstrapped charge-pump circuit to derive a 5V gate drive from V DD for DH.
Open-Drain Logic Output. PWROK is high when the voltage on FB is within +8% and -6% of its set-
point.
Current-Sense Amplifier’s Inverting Input. Place the current-sense resistor very close to the controller IC,
and use a Kelvin connection.
Current-Sense Amplifier’s Noninverting Input
Digital Inputs for Programming the Output Voltage. D0–D4 are logic inputs that set the output to a volt-
age between 1.3V and 3.5V (Table 2). D0–D4 are internally pulled up to V CC with 5μA current sources.
Loop Gain-Control Input. LG is a three-level input that is used to trade off loop gain vs. AC load-regula-
tion and load-transient response. Connect LG to V CC , REF, or AGND for 2%, 1%, or 0.5% AC load-reg-
ulation errors, respectively.
Analog Supply Input, 5V. Use an RC filter network, as shown in Figure 1.
Reference Output, 3.5V. Bypass REF to AGND with 0.1μF (min). Sources up to 100μA for external
loads. Force REF below 2V to turn off the controller.
Analog Ground
Voltage-Feedback Input. Connect FB to the CPU’s remote voltage-sense point. The voltage at this input
is regulated to a value determined by D0–D4.
Fast-Loop Compensation Capacitor Input. Connect a ceramic capacitor and resistor in series from
CC1 to AGND. See the section Compensating the Feedback Loop .
Slow-Loop Compensation Capacitor Input. Connect a ceramic capacitor from CC2 to AGND. See the
section Compensating the Feedback Loop.
Frequency-Select Input. FREQ = V CC : 1MHz
FREQ = REF: 600kHz
FREQ = AGND: 300kHz
Digital Inputs for Programming the Output Voltage
GlitchCatcher N-Channel MOSFET Driver Output. NDRV swings between V DD and PGND.
GlitchCatcher P-Channel MOSFET Driver Output. PDRV swings between V DD and PGND.
5V Power Input for MOSFET Drivers. Bypass V DD to PGND within 0.2 in. (5mm) of the V DD pin using a
0.1μF capacitor and 4.7μF capacitor connected in parallel.
Low-Side Synchronous Rectifier Gate-Drive Output. DL swings between PGND and V DD . See the
section BST High-Side Gate-Driver Supply and MOSFET Drivers .
Power Ground
Switching Node. Connect LX to the high-side MOSFET source and inductor.
High-Side Main MOSFET Switch Gate-Drive Output. DH is a floating driver output that swings from LX
to BST, riding on the LX switching-node voltage. See the section BST High-Side Gate-Driver Supply
and MOSFET Drivers .
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1638VRMEVKIT | 功能描述:DC/DC 开关控制器 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power 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 |
| MAX1639ESE | 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 |
| MAX1639ESE+ | 功能描述:DC/DC 开关控制器 High Speed Step Down 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 |
| MAX1639ESE+T | 功能描述:DC/DC 开关控制器 High Speed Step Down 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 |
| MAX1639ESE-T | 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 |
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