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参数资料
| 型号： | MAX1636EAP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/23页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 20-SSOP |
| 标准包装： | 66 |
| PWM 型： | 电流模式，混合 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 99% |
| 电源电压： | 3.15 V ~ 30 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： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
Low-Voltage, Precision Step-Down
Controller for Portable 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
NAME
CSH
CSL
RESET
SHDN
OVP
CC
REF
SYNC
GND
FB
V CC
V+
VL
DL
PGND
BST
DH
LX
SKIP
FUNCTION
Current-Sense Input, High Side
Current-Sense Input, Low Side. Also serves as a feedback input in fixed output modes.
Timed Reset Output. Low for at least 100ms after output voltage is valid, then goes high impedance
(open drain).
Shutdown Control Input. Puts chip in shutdown or standby mode, depending on OVP (Table 5).
Overvoltage Protection Enable/Disable. Tie to GND to disable OVP; tie to V CC to enable OVP.
Compensation pin. Connect a small capacitor to GND to set the integration time constant.
1.100V Reference Output. Capable of sourcing 50μA for external loads; bypass with a 0.22μF
(min) capacitor.
Oscillator Frequency Select and Synchronization Input. Tie to V CC for 300kHz operation; tie to GND for
200kHz operation.
Analog Ground
Feedback Input. Tie to GND for fixed 3.3V output; tie to V CC for fixed 2.5V output; tie to resistor divider for
adjustable mode.
Main Supply Voltage Input. Powers the PWM controller, logic, and reference. Input range is +3.15V to
+5.5V.
5V VL Linear-Regulator Input. The VL linear regulator automatically shuts off if V+ is shorted to V L . Bypass
V+ to GND with a 0.1μF capacitor close to the IC.
5V Linear-Regulator Output. Powers the DL low-side gate driver. Bypass with a 2.2μF (min) capacitor.
Low-Side Gate-Driver Output
Power Ground
Boost-Capacitor Connection
High-Side Gate-Driver Output
Inductor Connection
Low-Noise Mode Control. Forces fixed-frequency PWM operation when high.
Standard Application Circuit
The basic MAX1636 buck converter (Figure 1) is easily
adapted to meet a wide range of applications with
inputs up to 30V by substituting components from
Table 1. These circuits represent a good set of trade-
offs between cost, size, and efficiency, while staying
within the worst-case specification limits for stress-
related parameters, such as capacitor ripple current.
Do not change the circuits’ switching frequency without
first recalculating component values (particularly induc-
tance value at maximum battery voltage). Adding a
Schottky rectifier across the synchronous rectifier
improves circuit efficiency by approximately 1%. This
rectifier is otherwise not needed because the MOSFET
required typically incorporates a high-speed silicon
diode from drain to source. Use a Schottky rectifier
rated at a DC current equal to at least one-third of the
load current.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1636EAP+ | 功能描述:DC/DC 开关控制器 Precision Step-Down for Portable CPU Pwr 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 |
| MAX1636EAP+T | 功能描述:DC/DC 开关控制器 Precision Step-Down for Portable CPU Pwr 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 |
| MAX1636EAP-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 |
| MAX1637EEE | 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 |
| MAX1637EEE+ | 功能描述:DC/DC 开关控制器 Mini Precision 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 |
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