1.5A Low Dropout Linear Regulator
EC8812
General Description The EC8812 series of fixed output ultra low dropout linear regulators are designed for portable battery powered applications, which require low power consumption and low dropout voltage. Each device contains a bandgap voltage reference, an error amplifier, a PMOS power transistor, and current limit and temperature limit protection circuits. The EC8812 is designed to work with low cost electrolytic and ceramic capacitors and requires a minimum output capacitor of 10μF.
Typical Application
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Applications
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Pin Configurations
Pin Description
Pin Name | Pin Function Description |
GND | Ground |
OUT | Output Voltage |
IN | Input Voltage |
Functional Block Diagram
Ordering Information
SOT223 Package
TO252-3L Package
Marking Information：
SOT223：
Device | Marking Information | Package Type (Pin Type) | Remarks |
EC8812NNAB7R | 12NNA LLLLLL | SOT223 (Pin Type：A Type) | NN is Output Voltage(Ex：33=3.3V) LLLLLL：Date Code |
EC8812NNBB7R | 12NNB LLLLLL | SOT223 (Pin Type：A Type) | NN is Output Voltage(Ex：33=3.3V) LLLLLL：Date Code |
TO252-3L：
Device | Marking Information | Package Type (Pin Type) | Remarks |
EC881212A4TR | 8812 12TYW | TO252-3L (T Type) |
F=2015…)
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EC881215A4TR | 8812 15TYW | ||
EC881218A4TR | 8812 18TYW | ||
EC881225A4TR | 8812 25TYW | ||
EC881233A4TR | 8812 33TYW | ||
EC881212A4GR | 8812 12GYW | TO252-3L (G Type) | |
EC881215A4GR | 8812 15GYW | ||
EC881218A4GR | 8812 18GYW | ||
EC881225A4GR | 8812 25GYW | ||
EC881233A4GR | 8812 33GYW |
Absolute Maximum Ratings
Parameter | Symbol | Value | Units |
Input Voltage | VIN | 6 | V |
Output Voltage Range | VOUT | -0.3 to VIN | V |
Power Dissipation | PD | Internally Limited (3) |
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Output Short Circuit Duration |
| Infinite |
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Thermal Resistance, Junction-to-Ambient | ΘJA | 155(SOT-223) | °C/W |
90(TO-252) | |||
Lead Temperature (Soldering, 5 sec.) |
| 260 | °C |
Junction Temperature Range | TJ | -40 to +150 | °C |
Storage Temperature Range | TS | -40 to +150 | °C |
Recommended Operating Conditions
Parameter | Symbol | Value | Units |
Supply Input Voltage Range | VIN | 5 | V |
Junction Temperature Range | TJ | -40 to +125 | °C |
Electrical Characteristics
（VIN = 5V; CIN = 10μF; COUT = 10μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted）
Symbol | Parameter | Test Conditions | Min | Typ | Max | Unit |
VOUT | Output Voltage Accuracy | Vout=1.2V Vout=1.5V Vout=1.8V Vout=2.5V Vout=3.3V | 1.176 1.47 1.764 2.45 3.234 | 1.2 1.5 1.8 2.5 3.3 | 1.224 1.53 1.836 2.55 3.366 | V |
ΔVOUT/VOUT | Line Regulation | VIN = (VOUT + 0.7)V to 5.5V | -- | 0.1 | -- | %/V |
ΔVOUT/VOUT | Load Regulation (5) | VIN = (VOUT + 0.7)V IOUT = 10mA to 1500mA | -- | 2 | -- | % |
ΔVOUT/ΔT | Output Voltage Temperature Coefficient | Note 4 | -- | 0.1 | -- | mV/°C |
VIN – VOUT | Dropout Voltage (6) | IOUT = 150mA | -- | 40 | -- | mV |
IOUT = 500mA | -- | 150 | -- | mV | ||
IOUT = 1000mA | -- | 300 | -- | mV | ||
TPROTECTION | Thermal Protection | Thermal Protection Temperature | -- | 150 | -- | °C |
Protection Hysterisys | -- | 30 | -- | °C | ||
IQ | Quiescent Current | IOUT = 0mA | -- | 150 | -- | μA |
ILIMIT | Current Limit |
| -- | 2.5 | -- | A |
Ishort | Short Circuit Current | Vin=Vout+1V; Vout< 0.4V | -- | 0.55 | -- | A |
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details
Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range.
Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 1200mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.
Typical Performance Characteristics
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Applications Information
Application Hints Like any low dropout regulator, EC8812 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure performance. Input Capacitor An input capacitor of at least 10μF is required. Ceramic or Tantalum can be used. The value can be increase without upper limit. Output Capacitor An output capacitor is required for stability. It must be placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. The minimum value is 10μF but may be increase without limit.
| Thermal Considerations It is important that the thermal limit of the package is not exceeded. The EC8812 has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground. The power dissipation for a given application can be calculated as following:
The power dissipation (PD) is PD = IOUT * [VIN – VOUT]
The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 155°C/W（SOT-223） for EC8812. The EC8812 is designed to enter thermal protection at 170°C. For example, if TA is 25°C then the maximum PD is limited to about 0.94W. In other words, if IOUT(MAX) = 1200mA, then [VIN – VOUT] cannot exceed 780mV.
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Outline Drawing For SOT-223
Outline Drawing For TO252-3L
