参数资料
型号: MAX1708EEE+T
厂商: Maxim Integrated Products
文件页数: 8/14页
文件大小: 0K
描述: IC REG BST 3.3V/5V/ADJ 5A 16QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 升压(升压)
输出类型: 两者兼有
输出数: 1
输出电压: 3.3V,5V,可调
输入电压: 0.7 V ~ 5 V
PWM 型: 电流模式
频率 - 开关: 600kHz
电流 - 输出: 5A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
供应商设备封装: 16-QSOP
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
Pin Description
PIN
1
2
3, 4, 5
6, 9
7
8
NAME
ONB
ONA
LX
GND
SS/LIM
REF
FUNCTION
Shutdown Input. When ONB = high and ONA = low, the device turns off (Table 1).
On-Control Input. When ONA = high or ONB = low, the device turns on (Table 1).
Drain of N-Channel Power Switch. Connect pins 3, 4, and 5 together with wide traces.
Connect an external Schottky diode from LX to V OUT . (Figure 1)
Ground
Soft-Start and/or Current-Limit Input. Connect a capacitor from SS/LIM to GND to control the
rate at which the device reaches current limit (soft-start). To reduce the current limit from
the preset values, connect a resistor from SS/LIM to GND (see Design Procedure ). During
shutdown, SS/LIM is internally pulled to GND to discharge the soft-start capacitor.
Voltage Reference Output. Bypass with a 0.22μF capacitor to GND. Maximum REF load is
50 μA.
Output Voltage Sense Input. The device is powered from OUT. Bypass with a 0.1 μF
10
OUT
capacitor to PGND with less than 5mm trace length. Connect a 2
series resistor from the
output filter capacitor (0.1μF) to OUT (Figure 1).
DC-DC Converter Feedback Input. Connect FB to GND for internally set output voltage (see
11
12, 13, 14
15
16
FB
PGND
3.3 /5
CLK
3.3/ 5 pin description). Connect a resistor-divider from the output to set the output voltage in
the 2.5V to 5.5V range. FB regulates to 1.24V (Figure 4).
Power Ground, Source of N-Channel Power MOSFET Switch. Connect pins 12, 13, and 14
together with wide traces.
Output Voltage Selection Input. When FB is connected to GND, the regulator uses internal
feedback to set the output voltage. 3.3/ 5 = low sets output to 3.3V; 3.3/ 5 = high sets output
to 5V. If an external divider is used at FB, connect 3.3/ 5 to ground.
Clock Input for the DC-DC Converter. Connect to OUT for internal oscillator. Drive CLK with
an external clock for external synchronization.
8
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