NTE7107 Integrated Circuit Switching Regulator, 2.5A Description: The NTE7107 is a monolithic power regulator in a 7−Lead Staggered SIP type package delivering 2.5A at a voltage variable from 5V to 40V in step down configuration. Features of this device include current limiting, soft start, thermal protection, and 0 to 100% duty cycle for continuous operation mode. Efficient operation at switching frequencies up to 150kHz allows a reduction in the size and cost of external components. Features: D 2.5A Output Current D 5.1V to 40V Output Voltage Range D Precise ON−Chip Reference: ± 2% D High Switching Frequency D Very High Efficiency: Up to 90% D Very Few External Components D Soft Start D Internal Limiting Current D Thermal Shutdown Absolute Maximum Ratings: Input Voltage, V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V Input to Output Voltatge Difference, V1 − V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V Negative Output DC Voltage, V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1V Negative Output Peak Voltage (t = 0.1µs, f = 100kHz), V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −5V Voltage at Pin3 and Pin6, V3, V6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Voltage at Pin2, V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Pin3 Sink Current, I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA Pin5 Source Current, I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Power Dissipation (TC ≤ +90°C), Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15W Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +150°C Maximum Thermal Resistance, Junction−to−Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4°C/W Maximum Thermal Resistance, Junction−to−Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . 50°C/W Electrical Characteristics: (TJ = +25°C, Vi = 35V unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Vref − 40 V Dynamic Characteristics Output Voltage Range Vo Vi = 46V, Io = 1A Input Voltage Range Vi Vo = Vref to 36V, Io = 2.5A 9 − 46 V Line Regulation ∆Vo Vi = 10V to 40V, Vo = Vref, Io = 1A − 15 50 mV Load Regulation ∆Vo Vo = Vref, Io = 0.5A to 2A − 10 30 mV Internal Reference Voltage (Pin2) Vref Vi = 9V to 46V, Io = 1A 5.0 5.1 5.2 V TJ = 0° to +125°C, Io = 1A − 0.4 − mV/°C − 1.4 3.0 V Average Temperature Coefficient of Reference Voltage ∆Vref ∆T Dropout Voltage Vd Io = 2A Maximum Operating Load Current Iom Vi = 9V to 46V, Vo = Vref to 36V 2.5 − − A Current Limiting Threshold (PIn7) I7L Vi = 9V to 46V, Vo = Vref to 36V 3.0 − 4.5 A Input Average Current ISH Vi = 46V, Output Short Circuit − 30 60 mA f = 100kHz, Io = 2A Vo = Vref − 75 − % Vo = 12V − 85 − % 50 56 − dB 85 100 115 kHz Efficiency Supply Voltage Ripple Rejection Switching Frequency η SVR ∆Vi = 2V, fripple = 100Hz, Vo = Vref, Io = 1A f Voltage Stability of Switching Frequency ∆f ∆Vi Vi = 9V to 46V − 0.5 − % Temperature Stability of Switching Frequency ∆f ∆TJ TJ = 0 to +125°C − 1 − % Maximum Operating Switching Frequency fmax Vo = Vref, Io = 2A 120 150 − kHz Thermal Shutdown Junction Temperature Tsd − 150 − °C − 30 40 mA 0% Duty Cycle − 15 20 mA 0% Duty Cycle − − 1 mA DC Characteristics Quiescent Drain Current Output Leakage Current I1Q −I7L 100% Duty Cycle, Pin5 and Pin7 Open Vi = 46V Soft Start Source Current I6SO 100 130 150 µs Sink Current I6SI 50 70 120 µs Error Amp High Level Output Voltage V3H V2 = 4.7V, I3 = 100µA 3.5 − − V Low Level Output Voltage V3L V2 = 5.3V, I3 = 100µA − − 0.5 V Sink Output Current I3SI V2 = 5.3V 100 150 − µA −I3SO V2 = 4.7V 100 150 − µA Input Bias Current I2 V2 = 5.2V − 2 10 µA DC Open Loop Gain Gv V3 = 1V to 3V 46 55 − dB 5 − − mA Source Output Current Oscillator Oscillator Source Current −I5 Pin Connection Diagram (Front View) 7 Output 6 Soft Start 5 OSC T A B 4 GND/Tab 3 Frequency Comp 2 Feedback Input 1 Input .189 (4.8) .410 (10.42) .054 (1.38) .237 (6.0) .666 (16.9) .152 (3.93) Dia 1 .622 (15.8) 7 .890 (22.6) .300(7.62)