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参数资料
| 型号： | MAX5081ATE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 16TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 32 V |
| 输入电压： | 7.5 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 250kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
1A, 40V, MAXPower Step-Down
DC-DC Converters
Pin Description
PIN
MAX5080 MAX5081
NAME
FUNCTION
1
1
COMP
Error Amplifier Output. Connect COMP to the compensation feedback network.
Feedback Regulation Point. Connect to the center tap of a resistive divider from converter
2
2
FB
output to SGND to set the output voltage. The FB voltage regulates to the voltage present at SS
(1.23V).
ON/ OFF and External UVLO Control. The ON/ OFF rising threshold is set to approximately 1.23V.
3
3
ON/ OFF
Connect to the center tap of a resistive divider from IN to SGND to set the UVLO (rising)
threshold. Pull ON/ OFF to SGND to shut down the device. ON/ OFF can be used for power-
supply sequencing. Connect to IN for always-on operation.
4
4
SS
Soft-Start and Reference Output. Connect a capacitor from SS to SGND to set the soft-start
time. See the Applications Information section to calculate the value of the CSS capacitor.
Oscillator Synchronization Input. SYNC can be driven by an external 150kHz to 350kHz clock to
5
5
SYNC
synchronize the MAX5080/MAX5081’s switching frequency. Connect SYNC to SGND when not
used.
6
7
8
—
6
—
—
7, 8
DVREG
C+
C-
N.C.
Gate Drive Supply for High-Side MOSFET Driver. Connect externally to REG for MAX5080.
Connect to REG and the anode of the boost diode for MAX5081.
Charge-Pump Flying Capacitor Positive Connection
Charge-Pump Flying Capacitor Negative Connection
No Connection. Not internally connected. Can be left floating or connected to SGND.
Power Ground Connection. Connect the input filter capacitor’s negative terminal, the anode of
9
9
PGND
the freewheeling diode, and the output filter capacitor’s return to PGND. Connect externally to
SGND at a single point near the input capacitor’s return terminal.
10
11, 12
13, 14
15
16
EP
10
11, 12
13, 14
15
16
EP
BST
LX
IN
REG
SGND
EP
High-Side Gate Driver Supply. Connect BST to the cathode of the boost diode and to the
positive terminal of the boost capacitor.
Source Connection of Internal High-Side Switch. Connect the inductor and rectifier diode’s
cathode to LX.
Supply Input Connection. Connect to an external voltage source from 4.5V to 40V (MAX5080) or
a 7.5V to 40V (MAX5081).
Internal Regulator Output. 5V output for the MAX5080 and 8V output for the MAX5081. Bypass
to SGND with at least a 1μF ceramic capacitor.
Signal Ground Connection. Solder the exposed pad to a large SGND plane. Connect SGND
and PGND together at one point near the input bypass capacitor return terminal.
Exposed Pad. Connect exposed pad to SGND.
Detailed Description
The MAX5080/MAX5081 are voltage-mode buck con-
verters with internal 0.3 ? power MOSFET switches. The
MAX5080 has a wide input voltage range of 4.5V to
40V. The MAX5081’s input voltage range is 7.5V to 40V.
The internal low R DS_ON switch allows for up to 1A of
output current. The 250kHz fixed switching frequency,
external compensation, and voltage feed-forward sim-
plify loop compensation design and allow for a variety
of L and C filter components. Both devices offer an
automatic switchover to pulse-skipping (PFM) mode,
providing low quiescent current and high efficiency at
light loads. Under no load, a PFM mode operation
reduces the current consumption to only 1.4mA. In
shutdown, the supply current falls to 200μA. Additional
features include an externally programmable undervolt-
age lockout through the ON/ OFF pin, a programmable
soft-start, cycle-by-cycle current limit, hiccup mode
output short-circuit protection, and thermal shutdown.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5081ATE+ | 功能描述:直流/直流开关转换器 1A 40V MAXPower Step-Down RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5081ATE+T | 功能描述:直流/直流开关转换器 1A 40V MAXPower Step-Down RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5081ATE-T | 功能描述:直流/直流开关转换器 1A 40V MAXPower Step-Down RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5082 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1.5A, 40V, MAXPower Step-Down DC-DC Converters |
| MAX5082ATE | 功能描述:直流/直流开关转换器 1A 40V MAXPower Step-Down RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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