MCP1812AT-018/OT

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1. Describe

150 mA for MCP1811X/12X devices (MCP1811X) and 300 mA (MCP1812X) low dropout (LDO) linear Regulators that provide high current and low output voltage while remaining ultra-low 250 nA Quiescent current during device operation. return, MCP1811B/12B Shutdown 5 nA (typ) supply current consumption. The MCP1811X/12X family has nine standards Fixed output voltage versions: 1V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 4.0V. 150/300 mA output current capability, combined with has low output voltage capability, enabling The MCP1811X/12X device family is a good new option Ultra-Long Life LDO Applications with High Current requirements, but requires ultra-low power consumption during sleep. The MCP1812AT-018/OT device is stabilized with ceramic Output capacitors that inherently provide lower output noise and reduce overall size and cost Regulator Solutions. 1 µF only (2.2 µF for MCP1812X) The output capacitor needs to be stable The system has a low noise output. The MCP1811X/12X family can be combined with other Ultra-low current devices such as Microchip's eXtreme For complete low power (XLP) technology devices Ultra low power solution.

2. Feature

    1. Ultra-low quiescent current: 250 nA (typ)

    2. Ultra-low shutdown supply current:

        - 10 nA typical for MCP1811A/12A

        - 5 nA typical for MCP1811B/12B

    3. Output current capability:

        - 150 mA for MCP1811X (Note 1)

        - 300 mA for MCP1812X

    4. Input voltage range: 1.8V to 5.5V

    5. Standard output voltage (VR): 1V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 4.0V; for any other voltage options (between 1V and 4V) please contact you local sales office

    6. Stable ceramic output capacitors: 1.0 µF (MCP1811X) and 2.2 µF (MCP1812X)

    7. Overcurrent protection

    8. Output Discharge (Shutdown Mode, SHDN = GND) MCP1811A/12A

    9. Available in the following packages:

        - 3 lead SOT-23

        - 3 lead SC70

        - 4 lead 1 x 1 mm UDFN

        - 5 lead SOT-23

        - 5 lead SC70

3. Application

    1. Energy harvesting

    2. Long-life, battery-powered applications

    3. smart card

    4. Ultra-low consumption "green" products

    5. Wearable electronics (smart watches, bracelets, headphones)

    6. Medical equipment (hearing aids)

4. Ground Pin (GND)

Achieve the best noise and power supply rejection ratio (PSRR) performance, the GND pin of the LDO should be Connect to an electrically "quiet" ground circuit. ground The pins of the LDO conduct only ground current, so No need for wider traces. for power applications There are switches or noisy circuits, connect the GND pin to Return of the output capacitor. ground plane helps Reduces rapidly induced inductance and voltage spikes transient load current.

5. Regulated Output Voltage Pin

(VOUT) The VOUT pin is the regulated output voltage VR will. LDO stability requires minimum output capacitors of 1.0 µF (MCP1811X) and 2.2 µF (MCP1812X). The MCP1811X/12X are stable with ceramic capacitors. Used for output capacitor selection guidelines.

6. Input Voltage Supply Pin (VIN)

Connect the input voltage source to VIN. Input capacitors are recommended if the input voltage source is several inches away from the LDO or if it is a battery. Typical input capacitance values of 1 µF to 10 µF are sufficient for most applications (1 µF typical for MCP1811X and 2.2 µF typical for MCP1812X). The type of capacitor used is ceramic. However, the low ESR characteristics of ceramic capacitors will result in better noise and PSRR performance at high frequencies.

7. Shutdown Control Input (SHDN)

The SHDN input is used to turn the LDO output voltage on and off. When the SHDN input is logic high, the LDO output voltage is enabled. When the SHDN input is pulled to logic low, the LDO output voltage is disabled (MCP1811A/12A output discharges). When the SHDN input is pulled low, the LDO enters a low-current shutdown state with a typical quiescent current of 10 nA for the MCP1811A/12A and 5 nA for the MCP1811B/12B.

8. Device overview

The MCP1811X/12X family is a 150 mA/300 mA output current, low dropout (LDO) regulator. Low dropout voltage of 400 mV (typ) at 300 mA makes it recommended for long life battery powered applications. Input voltage range From 1.8V to 5.5V minimum. MCP1811X/12X series has a shutdown control input pin that is Nine standard fixed output voltage options are available: 1V, 1.2V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 4.0V. it Using a proprietary voltage reference and sensing Solutions to keep ultra-low 250 nA static current.

9. Output Capability and Current Limit

The MCP1811X/12X LDOs are tested and guaranteed to provide at least 150 mA of output current for the MCP1811X and at least 300 mA of output current for the MCP1812X. The MCP1811X/12X devices do not contain an internal voltage divider. This is another design key to achieving ultra-low power consumption. Additionally, there is a pull-down switch on the output to limit overshoot when powering ultra-light loads. Due to increased leakage through power transistors at high temperatures