S-816A27AMC-BACT2G Seiko Instruments, S-816A27AMC-BACT2G Datasheet - Page 9

• Manufacturer Part Number: S-816A27AMC-BACT2G
• Description: IC REG LDO 1A 2.7V SOT23-5
• Manufacturer: Seiko Instruments

Specifications of S-816A27AMC-BACT2G

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.7V
• Voltage - Input: Up to 16V
• Voltage - Dropout (typical): 0.1V @ 100mA
• Number Of Regulators: 1
• Current - Output: 1A
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 16 V
• Output Voltage: 2.7 V
• Output Type: Fixed
• Dropout Voltage (max): 100 mV
• Output Current: 1 A
• Line Regulation: 0.15 % / V
• Load Regulation: 60 mV
• Voltage Regulation Accuracy: 2 %
• Maximum Power Dissipation: 600 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.6.0
2.2. Overcurrent Protection Circuit
2.3. Phase Compensation Circuit
The overcurrent protection function of the S-816 Series monitors the EXT pin sink current (base current of
the external PNP transistor) with an overcurrent protection circuit incorporated in the IC, and limits that
current (EXT pin sink current).
As the load current increases, the EXT pin sink current (base current of the external PNP transistor) also
grows larger to maintain the output voltage. The overcurrent protection circuit clamps and limits the EXT
pin sink current to the EXT output sink overcurrent set value (I
beyond that value.
The load current at which the overcurrent protection function works is represented by the following
equation:
In this case, h
I
current, the output voltage will fall.
Note that within the overcurrent protection function of this IC, the external PNP transistor may not be able
to be protected from collector overcurrents produced by an EXT-GND short-circuiting or other
phenomenon occurring outside the IC. To protect the external PNP transistor from such collector
overcurrents, it will be necessary to choose a transistor with a larger power dissipation than I
or to add an external overcurrent protection circuit. With regard to this external overcurrent protection
circuit, refer to "Overcurrent Protection Circuit" in " Application Circuits".
The S-816 Series performs phase compensation with a phase compensation circuit, incorporated in the
IC, and the ESR (Equivalent Series Resistance) of an output capacitor, to secure stable operation even in
the presence of output load variation. A uniquely devised phase compensation circuit has resulted in
improved transient response characteristics of the IC, while preserving the same feature of low current
consumption. This feature allows the IC to be used in applications where the input variation or load
variation is heavy.
Because the S-816 Series is designed to perform the phase compensation, utilizing the ESR of an output
capacitor, such output capacitor (C
capacitor to be employed has an optimum range of their own characteristics, be sure to choose
components for the IC with your all attention. For details, refer to " Selection of Associated External
Components".
OUT_MAX
I
OUT_MAX
_00
represents the maximum output current of this regulator. If it is attempted to obtain a higher load
= I
MAX
FE
× h
is the DC amplification factor of the external PNP transistor.
FE
EXTERNAL TRANSISTOR TYPE CMOS VOLTAGE REGULATOR
L
) should always be placed between VOUT and VSS. Since each
Seiko Instruments Inc.
MAX
) in order to prevent it from increasing
S-816 Series
OUT_MAX
× V
9
IN
,