CS8121YDPSR7

CS8121 ONSEMI | Alldatasheet

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Technical content

Features

I 5V ± 4% Output Voltage I Low Dropout Voltage (1.2V @ 1A) I Low Quiescent Current (4mA @ IOUT = 1A) I µP Compatible Control Functions I Low Current Sleep Mode IQ = 250µA I Fault Protection Thermal Shutdown Short Circuit 60V Peak Transient Voltage ENABLE RESET Package Options

5 Lead TO-220

5V , 1A Linear Regulator with and ENABLERESET CS8121

Description

3 Gnd

7 Lead D2PAK

4 Gnd

7V OUT(SENSE) RESET ENABLE December, 2001 - Rev. 7 ON Semiconductor

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885–3600 Fax: (401)885–5786 N. American Technical Support: 800-282-9855 Web Site: www.cherry–semi.com ARCHIVE DEVICE NOT RECOMMENDED FOR NEW DESIGN The CS8121 is a 5V, 1A precision linear regulator with two microprocessor compatible control functions and pro- tection circuitry included on chip. The composite NPN-PNP output pass tran- sistor assures a lower dropout voltage (1.2V @ 1A) without requiring exces- sive supply current (4mA). The CS8121’s two logic control func- tions make this regulator well suited to applications requiring microprocessor- based control at the board or module level. controls the output stage. A high voltage (>2.9V) on the lead turns off the regula- tor’s pass transistor and sends the IC into Sleep mode where it draws only 250µA. sends a signal when the IC is powering up or when- ever the output voltage falls out of reg- ulation. The signal is valid down to V OUT = 1V. The CS8121 design optimizes supply rejection by switching the internal bandgap reference from the supply input to the regulator output as soon as the nominal output voltage is achieved. Additional on chip filtering enhances rejection of high frequency transients on all external leads. The CS8121 is fault protected against short circuit, over voltage and thermal runaway conditions. RESET RESETRESET ENABLE ENABLE Over Voltage Shutdown RESET Comparator Error Amplifier TO VOUT VREF ENABLE Comparator Bandgap Supply Output Current Limit Bandgap Reference Thermal Shutdown V IN ENABLE RESET V OUT Gnd V OUT(SENSE)

5 Lead

Electrical Characteristics: IOUT = 5mA, -40°C ≤ TJ ≤150°C , 7V ≤ VIN ≤ 26V, -40°C ≤ TA ≤ 125°C unless otherwise specified PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CS8121 Absolute Maximum Ratings Lead Temperature Soldering I Output Stage Output Voltage, VOUT 7V ≤ VIN ≤ 26V, 1mA ≤ IOUT ≤ 1A 4.8 5.0 5.2 V Line Regulation 7V ≤ VIN ≤ 26V, IOUT = 5mA 0 50 mV Load Regulation 5mA ≤ IOUT ≤ 1A 10 70 mV Supply Voltage Rejection V IN = 14VDC + 1VRMS 54 70 dB @120Hz, ILOAD = 50Ω Dropout Voltage I OUT = 1A 1.2 1.8 V Quiescent Current = High, V IN = 12V 0.25 0.65 mA = Low, IOUT = 1A 4 20 mA I Protection Circuits Short Circuit Current 1.5 A Thermal Shutdown 150 190 °C Overvoltage Shutdown 26 40 V I Saturation Voltage 1V < V OUT < VRT(OFF), 3.1kΩ pull-up 0.1 0.4 V to VOUT Output Leakage = Low 0 25 µA Current V OUT > VRT(ON), V = V OUT Power ON/OFF 3.1k Ω pull-up to VOUT 0.7 1.0 V Peak Output Voltage Threshold ON V OUT - 0.10 V OUT - 0.04 V (VOUT Increasing) Threshold OFF 4.75 V OUT - 0.14 V (VOUT Decreasing) Threshold Hysteresis 10 40 mV I Input High Voltage 7V < V IN < 26V 2.9 3.9 V Input Low Voltage 7V < V IN < 26V 1.1 2.1 V Input Hysteresis 7V < V IN < 26V 0.4 0.8 2.8 V Input Current Gnd < V IN(HI) < VOUT 0± 1 0 µ A ENABLE RESET RESET RESET RESET RESET ENABLERESET RESET RESET ENABLE ENABLE

Typical Performance Characteristics PACKAGE LEAD # LEAD SYMBOL FUNCTION Junction Temperature (˚C) -40 -20 0 20 40 60 80 100 120 140 150 5.02 5.01 4.99 4.98 4.97 4.96 4.95 IOUT = 100mA VOUT (V) 5.00V @ 25˚C Output Voltage vs. Temperature -35 -40 -45 -50 0 200 400 600 800 1A -30 -25 -20 -15 -10 –40 °C 25 °C125 °C IOUT (A) Load Reg. (mV) VIN =14V Load Regulation vs. Output Current Over Temperature Line Reg. (mV) VIN = 7 to 26V -40˚C 125˚C 25˚C -10 IOUT (A) 0 0.2 0.4 0.6 0.8 1A Line Regulation vs. Output Current Over Temperature 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 IOUT (A) Dropout Voltage (V) -40°C 25°C 125°C Dropout Voltage vs. Output Current Over Temperature

7 Lead 5 Lead TO-220

1 NC No Connection. 21 V IN Supply voltage to IC, usually direct from the battery. 3 2 CMOS compatible logical. V OUT is disabled i.e. placed in a high impedance state when ENABLE is high. 4 3 Gnd Ground connection. 5 4 CMOS compatible output lead. goes low whenever VOUT falls out of regulation. The delay is externally programmed. 65 V OUT Regulated output voltage, 5V (typ). 7V OUT(SENSE) Remote sensing of output voltage. RESET RESETRESET ENABLE

mode where it typically draws 250µA. by withdrawing drive current, once the SWITCH is open. ish key housekeeping functions before power is removed. delay, load transient response and loop stability. facturers data sheet usually provides this information. added by the longer leads is negligible. ensure a stable design under steady state conditions. case load conditions for the regulator at low temperature. Figure 5. Microprocessor control of CS8121 using external switching transistor Q1.

CS8121YT5 5 Lead TO-220 Straight CS8121YTVA5 5 Lead TO-220 Vertical CS8121YTHA5 5 Lead TO-220 Horizontal CS8121YDPS7 7 Lead D 2PAK Short-Leaded CS8121YDPSR7 7 Lead D 2PAK Short-Leaded (tape & reel)

Ordering Information

Thermal Data 5 Lead 7 Lead TO-220 D 2PAK RΘ JC typ 2.5 2.5 °C/W RΘ JA typ 50 10-50* °C/W *Depending on thermal properties of substrate,RΘ JA = RΘ JC + RΘ CA. Package Specification PACKAGE THERMAL DATAPACKAGE DIMENSIONS IN mm (INCHES) CS8121

5 Lead TO-220 (T) Straight

2.87 (.113) 2.62 (.103) 6.93(.273) 6.68(.263) 9.78 (.385) 10.54 (.415) 1.02(.040) 0.63(.025) 1.83(.072) 1.57(.062) 0.56 (.022) 0.36 (.014) 2.92 (.115) 2.29 (.090) 1.40 (.055) 4.06 (.160) 6.55 (.258) 5.94 (.234) 14.22 (.560) 0.76 (.030) 3.71 (.146) 3.96 (.156) 14.99 (.590) 14.22 (.560) ON Semiconductor and the ON Logo are trademarks of Semiconductor Components Industries, LLC (SCILLC). ON Semiconductor reserves the right to make changes without further notice to any products herein. For additional infor- mation and the latest available information, please contact your local ON Semiconductor representative. © Semiconductor Components Industries, LLC, 2000 ARCHIVE DEVICE NOT RECOMMENDED FOR NEW DESIGN

5 Lead TO-220 (TVA) Vertical

1.68 7.51 (.296) 1.78 (.070) 4.34 (.171) 0.56 (.022) 0.36 (.014) 1.40 (.055) 1.14 (.045) 4.83 (.190) 4.06 (.160) 14.99 (.590) 14.22 (.560) 2.92 (.115) 2.29 (.090) .94 (.037) .69 (.027) 8.64 (.340) 7.87 (.310) 6.80 (.268) 10.54 (.415) 9.78 (.385) 2.87 (.113) 2.62 (.103) 6.55 (.258) 5.94 (.234) 3.96 (.156) 3.71 (.146)

7 Lead D2PAK (DPS)* Short-Leaded

1.98 (.078) 1.47 (.058) 14.71 (.579) 13.69 (.539) 4.57 (.180) 4.31 (.170) 1.40 (.055) 1.14 (.045) 2.79 (.110) 2.54 (.100) TERMINAL 8 7.75 (.305) REF 6.50 (.256) REF 10.31 (.406) 10.05 (.396) 1.27 (.050) REF 1.68 (.066) 1.40 (.055) .254 (.010) REF0.91 (.036) 0.66 (.026) 8.53 (.336) 8.28 (.326) 0.10 (.004) 0.00 (.000) *ON SEMICONDUCTOR SHORT-LEADED FOOTPRINT