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参数资料
| 型号： | MAX1616EUK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 30MA SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 28 V |
| 输入电压： | 4 V ~ 28 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 30mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
| 其它名称： | MAX1616EUK+TDKR |
High-Voltage, Low-Power Linear Regulators
for Notebook Computers
______________________________________________________________Pin Description
PIN
MAX1615
1
2
3
4
—
5
MAX1616
1
2
3
—
4
5
NAME
IN
GND
OUT
5/ 3
FB
SHDN
FUNCTION
Positive Input Voltage. Connect to a +4V to +28V supply.
Ground
Regulator Output
Preset Output Voltage Select. Connect to GND for 3.3V output or to OUT
for 5.0V output.
Feedback Input. Regulates to 1.24V nominally.
Shutdown, active low input. Connect to IN for automatic start up.
The MAX1615’s output voltage is fed back through an
internal resistor voltage divider connected to OUT. Set
VREF
IN
CURRENT
LIMIT
OUT
the output voltage to either 3.3V or 5.0V with the 5/ 3 pin.
Select the 5V output by connecting 5/ 3 to OUT, or the
3.3V output by connecting 5/ 3 to GND.
The MAX1616 uses external feedback, allowing the out-
put voltage to be set by external resistors (see Setting
the MAX1616 Output Voltage section). The typical FB
threshold is at 1.24V.
SHDN
MAX1615
MAX1616
Shutdown
The device enters shutdown mode when SHDN is low.
In shutdown mode, the pass transistor, control circuit,
reference, and all biases turn off, reducing the supply
current to below 1μA. Connect SHDN to IN for automatic
start-up.
Current Limit
Output current is limited to 100mA (typical). The current
limit exceeds the 30mA (max) safe operating limit. The
output can be shorted to ground for 30 seconds without
FB
(MAX1616)
5/3
(MAX1615)
GND
damaging the part.
Thermal-Overload Protection
Figure 1. Functional Diagram
_______________Detailed Description
The MAX1615/MAX1616 low-quiescent-current linear
regulators are designed primarily for high input voltage
applications. The MAX1615 supplies a preselected 3.3V
or 5.0V output for loads up to 30mA. The MAX1616
provides an adjustable voltage from 1.24V to 28V. The
maximum output current is a function of the package’s
maximum power dissipation for a given temperature. A
5μA load is required to maintain output regulation.
When the junction temperature exceeds T J = +150°C,
the thermal sensor sends a signal to the shutdown
logic, turning off the pass transistor and allowing the IC
to cool. The thermal sensor turns the pass transistor on
again after the IC ’s junction temperature cools by
+20°C (typical), resulting in a pulsating output during
continuous thermal-overload conditions.
Operating Region and Power Dissipation
Maximum power dissipation depends on the thermal
resistance of the case and circuit board, the tempera-
ture difference between the die junction and ambient
air, and the rate of air flow. The device’s power dissipa-
_______________________________________________________________________________________
5
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