FEATURES

• Operating Voltage (Maximum Rating) ·················· 3.6 V to 34 V (36 V)

• Consumption Current ····································· Typ. 18 μA (VIN = 12 V)

• Stand-by Current ············································ Typ. 0 μA (VIN = 34 V, CE = 0 V)

• Output Voltage ··············································· Externally-adjustable at 0.8 V or more

(Max. step down ratio 160 ns  fosc)

• Feedback Voltage and Tolerance ······················· 0.8 V1.0%

• Output Current ··············································· 3 A(1)

• Operating Frequency ······································· 300 kHz to 2.4 MHz settable by External resistor

• Minimum Off Time ·········································· Typ. 120 ns

• Maximum Duty ··············································· Min. 93% (fosc = 300 kHz), Min. 67% (fosc = 2400 kHz)

• UVLO Function Detection Voltage ······················ Typ. 2.6 V

• OVLO Function Detection Voltage ···················· Min. 38 V

• Soft-start Time ··············································· Internal soft-start time (Typ. 0.4 ms), as a lower limit,

Externally-adjustable by using capacitor

• High-side Switch Current Limit ·························· Typ. 4.5 A, as a upper limit,

Externally-adjustable by using resistor

• Thermal Shutdown Function ····························· Typ. 160C

• CE Threshold Voltage ······································ Typ. 1.0 V

• Latch Protection Delay Time ····························· Typ. 2 ms (R1270S001A)

• Fold-back Protection ······································· Fold-back for Oscillation frequency

• VFB Voltage Temperature Tolerance (ΔVFB/ΔTa)· ···· Typ. ±100 ppm/°C (−40°C ≤ Ta ≤ 105°C)

• Packages ····················································· HSOP-18