Datasheet > ADP161

ADP161

更新时间： 2022-05-13 19:04:49

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
20页	513K
描述
Ultralow Quiescent Current, 150 mA, CMOS Linear Regulator

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数据手册

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ADP161 数据手册

ADP160/ADP161

3.5

3.0

2.5

2.0

1.5

1.0

0.5

To guarantee the performance of the ADP160/ADP161, it is

imperative that the effects of dc bias, temperature, and tolerances

on the behavior of the capacitors are evaluated for each.

3.3V

2.5V

ENABLE FEATURE

The ADP160/ADP161 use the EN pin to enable and disable the

VOUT pin under normal operating conditions. As shown in

Figure ꢀꢀ, when a rising voltage on EN crosses the active threshold,

VOUT turns on. When a falling voltage on EN crosses the inactive

threshold, VOUT turns off.

1.2V

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

500 1000 1500 2000 2500 3000 3500 4000 4500

TIME (µs)

Figure 35. Typical Start-Up Behavior

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

4.2V

0.5

0.7

0.9

1.1

1.3

1.5

EN VOLTAGE (V)

Figure 33. Typical EN Pin Operation

1.2V

As shown in Figure ꢀꢀ, the EN pin has hysteresis built in. This

prevents on/off oscillations that can occur due to noise on the

EN pin as it passes through the threshold points.

200

400

600

TIME (µs)

800

1000

The EN pin active/inactive thresholds are derived from the VIN

voltage. Therefore, these thresholds vary with changing input

voltage. Figure ꢀ4 shows typical EN active/inactive thresholds

when the input voltage varies from 2.2 V to 5.5 V.

1.1

Figure 36. Typical Shutdown Behavior

CURRENT LIMIT AND THERMAL OVERLOAD

PROTECTION

The ADP160/ADP161 are protected against damage due to

excessive power dissipation by current and thermal overload

protection circuits. The ADP160/ADP161 are designed to

current limit when the output load reaches ꢀ20 mA (typical).

When the output load exceeds ꢀ20 mA, the output voltage is

reduced to maintain a constant current limit.

1.0

0.9

EN RISE

0.8

Thermal overload protection is included, which limits the junction

temperature to a maximum of 150°C (typical). Under extreme

conditions (that is, high ambient temperature and power dissipation),

when the junction temperature starts to rise above 150°C, the

output is turned off, reducing the output current to zero. When

the junction temperature drops below 1ꢀ5°C, the output is turned

on again and the output current is restored to its nominal value.

EN FALL

0.7

0.6

0.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

INPUT VOLTAGE (V)

Figure 34. Typical EN Pin Thresholds vs. Input Voltage

The start-up and shutdown behavior of the ADP160 is shown in

Figure ꢀ5 and Figure ꢀ6.

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