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参数资料
| 型号： | MAX1715EEI |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/25页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 控制器 |
| 输出数： | 2 |
| 频率 - 最大： | 620kHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 5.5 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： | 28-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
Ultra-High Efficiency, Dual Step-Down
Controller for Notebook Computers
Pin Description
PIN
1
2
3
4
NAME
OUT1
FB1
ILIM1
V+
FUNCTION
Output Voltage Connection for the OUT1 PWM. Connect directly to the junction of the external inductor and
output filter capacitors. OUT1 senses the output voltage to determine the on-time and also serves as the
feedback input in fixed-output modes.
Feedback Input for OUT1. Connect to AGND for 1.8V fixed output or to V CC for 3.3V fixed output, or connect
to a resistor-divider from OUT1 for an adjustable output.
Current-Limit Threshold Adjustment for OUT1. The LX1-PGND current-limit threshold defaults to +100mV if
ILIM1 is connected to V CC . Or, connect an external resistor to AGND to adjust the limit. A precision 5μA pull-up
current through R EXT sets the threshold from 50mV to 200mV. The voltage on the pin is 10 times the current-
limit voltage. Choose R EXT equal to 2k Ω per mV of current-limit threshold (100k Ω to 400k Ω ).
Battery Voltage Sense Connection. Connect to the input power source. V+ is used only to set the PWM one-
shot timing.
On-Time Selection Control Input. This is a four-level input used to determine DH_ on-time. The TON table
below is for V IN = 24V, V OUT1 = 1.8V, V OUT2 = 2.5V condition.
5
TON
TON
AGND
REF
Open
V CC
Frequency (OUT1) (kHz)
620
485
345
235
170
Frequency (OUT2) (kHz)
460
355
255
170
6
7
8
9
10
11
12
13
14
15, 23,
28
SKIP
PGOOD
AGND
REF
ON1
ON2
ILIM2
FB2
OUT2
N.C.
Pulse-Skipping Control Input. Connect to V CC for low-noise forced-PWM mode. Connect to AGND to enable
pulse-skipping operation.
Power-Good Open-Drain Output. PGOOD is low when either FB_ input is more than 5.5% below the normal
regulation point (typ).
Analog Ground
+2.0V Reference Voltage Connection. Bypass to AGND with 0.22μF (min) capacitor. Can supply 50μA for
external loads.
OUT1 ON/ OFF Control Input. Drive to AGND to turn OUT1 off. Drive to V CC to turn OUT1 on.
OUT2 ON/ OFF Control Input. Drive to AGND to turn OUT2 off. Drive to V CC to turn OUT2 on.
Current-Limit Threshold Adjustment for OUT2. The LX2-PGND current-limit threshold defaults to +100mV if
ILIM2 is connected to V CC . Or, connect an external resistor to AGND to adjust the limit. A precision 5μA pull-up
current through R EXT sets the threshold from 50mV to 200mV. The voltage on the pin is 10 times the current-
limit voltage. Choose R EXT equal to 2k Ω per mV of current-limit threshold (100k Ω to 400k Ω ).
Feedback Input for OUT2. Connect to AGND for 2.5V fixed output, or connect to a resistor-divider from
OUT2 for an adjustable output.
Output Voltage Connection for the OUT2 PWM. Connect directly to the junction of the external inductor and
output filter capacitors. OUT2 senses the output voltage to determine the on-time and also serves as the
feedback input in fixed-output mode.
No Connection. These pins are not connected to any internal circuitry. Connect the N.C. pins to the ground
plane to enhance thermal conductivity.
8
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相关代理商/技术参数 |
参数描述 |
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| MAX1715EEI+ | 功能描述:DC/DC 开关控制器 Dual Step-Down Controller 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 |
| MAX1715EEI+T | 功能描述:DC/DC 开关控制器 Dual Step-Down Controller 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 |
| MAX1715EEI-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 |
| MAX1715EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1715 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 |
| MAX1716EEG | 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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