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参数资料
| 型号： | MAX8655ETN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/23页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 25A 56TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.7 V ~ 5.5 V |
| 输入电压： | 4.5 V ~ 25 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 电流 - 输出： | 25A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 56-TQFN-EP（8x8） |
Highly Integrated, 25A, Wide-Input,
Internal MOSFET, Step-Down Regulator
Pin Description
PIN
1–5, 51–56
6, 16–21
7–15
22
23, 28, 39,
48
24
25
26
27
29, 30, 42, 49
31
32
33
34
35
36
37
38
NAME
PVIN
LX
PGND
VLGND
GND
VL
IN
EN
AVL
N.C.
CS+
CS-
ILIM1
OVP
FB
COMP
SS
REFIN
FUNCTION
Power-Input Supply. PVIN connects to the drain of the internal high-side MOSFET. Connect input-
decoupling capacitors as close as possible between PVIN and PGND.
External Inductor Connection. Connect to the external power inductor. Leave pin 6 unconnected for
best routing.
Power Ground Connection from Source of Internal Low-Side MOSFET. Connect input-decoupling
capacitors as close as possible between PVIN and PGND.
Return for Low-Side MOSFET Gate-Driver Current
Analog Ground. Connect all pins to the analog ground plane, and connect the analog and power
ground planes together at the negative terminal of the output capacitor. Low-current signals return to
GND. Pin 28 must be connected externally to GND-EP, the analog ground plane.
Internal 6.5V Linear-Regulator Output. Connect a 2.2μF to 10μF ceramic capacitor from VL to VLGND.
For V IN < 7V, connect VL directly to IN. VL supplies power for the internal gate drivers. VL is the input
to the AVL internal linear regulator.
Input Supply Voltage. IN is the input to the VL linear regulator. Connect VL to IN for V IN < 7V.
Decouple to PGND with a 0.22μF ceramic capacitor.
Enable. Apply logic-high to EN to enable the output, or logic-low to place the regulator in low-power
shutdown mode. Connect EN to IN for always-on operation.
Internal 5V Linear-Regulator Output. AVL powers the MAX8655’s internal circuits. Connect a 1μF
ceramic capacitor from AVL to GND.
No Connection. Not internally connected.
Positive Differential Current-Sense Input
Negative Differential Current-Sense Input
Analog Programmable Current-Limit Input for Inductor Current. Connect a resistor from ILIM1 to GND
to set the overcurrent threshold. ILIM1 sources 10μA through the resistor, and the voltage at ILIM1 is
attenuated 7.5:1 to set the final current limit. For example, a 60k ? resistor results in 600mV at ILIM1.
This results in a current-limit threshold (V CS+ - V CS- ) of 80mV. The ILIM1 resistor range is 24k ? to
60k ? . Connect ILIM1 to AVL to set the default threshold of 80mV.
Output-Voltage Sensing for Overvoltage Protection. Connect OVP to the center of a resistor-divider
connected between the output of the regulator and GND to set the FB independent output
overvoltage trip point. Connect OVP to FB if this independence is not desired. The OVP threshold is
1.15 times the nominal feedback regulation voltage.
Feedback Input. Connect FB to the center of a resistor voltage-divider connected between the output
and GND to set the output voltage. FB regulates to 0.7V or V REFIN .
Loop Compensation. Connect COMP to an external RC network to compensate the loop. COMP is
internally pulled to GND through 20 ? during shutdown.
Soft-Start. Connect a 0.01μF to 1μF ceramic capacitor from SS to GND. This capacitor sets the soft-
start period during startup. See the Startup and Soft-Start section for more details. SS is internally
pulled to GND through 20 ? during shutdown.
External Reference Input. Connect REFIN to AVL to use the internal 0.7V reference for the feedback
threshold.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8655ETN/GG8 | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8655ETN+ | 功能描述:直流/直流开关调节器 25A Int MOSFET Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8655ETN+T | 功能描述:直流/直流开关调节器 25A Int MOSFET Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8655ETN+TW | 功能描述:直流/直流开关调节器 25A Int MOSFET Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8655ETN+W | 功能描述:直流/直流开关调节器 25A Int MOSFET Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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