S-1170B40UC-OTZTFG Seiko Instruments, S-1170B40UC-OTZTFG Datasheet - Page 16

• Manufacturer Part Number: S-1170B40UC-OTZTFG
• Description: IC REG LDO 800MA 4V SOT89-5
• Manufacturer: Seiko Instruments

Specifications of S-1170B40UC-OTZTFG

• Regulator Topology: Positive Fixed
• Voltage - Output: 4V
• Voltage - Input: Up to 6.5V
• Voltage - Dropout (typical): 0.12V @ 300mA
• Number Of Regulators: 1
• Current - Output: 800mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-89-5
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6.5 V
• Output Voltage: 4 V
• Output Type: Fixed
• Dropout Voltage (max): 0.18 V at 300 mA
• Output Current: 800 mA
• Line Regulation: 0.3 % / V
• Load Regulation: 100 mV
• Voltage Regulation Accuracy: 1 %
• Maximum Power Dissipation: 1 W
• 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

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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1170 Series
4. T hermal shutdown circuit
The S-1170 Series implements a thermal shutdown circuit to protect the device from damage due to
overheating. When the junction temperature rises to 150°C (typ.), the thermal shutdown circuit operates
and the regulator operation stops. When the junction temperature drops to 120°C (typ.), the thermal
shutdown circuit is released and the regulator operation resumes.
If the thermal shutdown circuit starts operating due to self-heating, the regulator operation stops and the
output voltage falls.
temperature of the IC is lowered. When the temperature has dropped, the thermal shutdown circuit is
released, the regulator operation resumes, and self-heat is generated again. By repeating this procedure,
the output voltage waveform forms pulses.
operation, continues until the internal power consumption is reduced by reducing either the input voltage
or output current or both, or the ambient temperature is lowered.
Thermal Shutdown Circuit
Operating: 150°C (typ.)
Released: 120°C (typ.)
When the regulator operation has stopped, no self-heat is generated and the
Table 7
Seiko Instruments Inc.
VOUT Pin Voltage
Set value
V
This phenomenon, stopping and resuming the regulator
SS
level
Rev.4.0
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