CS52015-1 CHERRY | Alldatasheet

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Technical content

Features

n Output Current to 1.5A n Output Accuracy to ±1% Over Temperature n Dropout Voltage (typical) 1.05V @ 1.5A n Fast Transient Response n Fault Protection Current Limit Thermal Shutdown Package Options 3L TO-220 Tab (VOUT) CS52015-1 1.5A Adjustable Linear Regulator CS52015-1 The CS52015-1 linear regulator pro- vides 1.5A with an accuracy of ±1%. The device uses two external resis- tors to set the output voltage within a 1.25V to 5.5V range. The regulator is intended for use as a post regulator and microprocessor supply. The fast loop response and low dropout voltage make this reg- ulator ideal for applications where low voltage operation and good transient response are important. The circuit is designed to operate with dropout voltages less than 1.4V at 1.5A output current. Device protection includes overcurrent and thermal shutdown. The CS52015-1 is pin compatible with the LT1086 family of linear regulators but has lower dropout voltage. The regulator is available in TO- 220, surface mount D 2, and SOT-223 packages. Application Diagram Consult factory for fixed output voltage versions. CS52015 -1

1 Adj

OUT (Tab) 3V IN

Description

Tab (VOUT) A Company ¨ 5.0V CS52015-1 VIN Adj 124W 200W 3.3V @ 1.5A 0.1mF Tantalum 22mF 5V10 mF VOUT SOT-223 Tab (VOUT) Rev. 2/17/98

Lead Temperature Soldering PACKAGE PIN # PIN SYMBOL FUNCTION PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Electrical Characteristics: CIN = 10µF, COUT = 22µF Tantalum, VOUT + VDROPOUT < VIN < 7V, 0¡C ² TA ² 70¡C, TJ ² +150¡C, unless otherwise specified, Ifull load = 1.5A. Package Pin Description n Adjustable Output Voltage (CS52015-1) Reference Voltage V INÐVOUT=1.5V; VAdj = 0V 1.241 1.254 1.266 V (Notes 1 and 2) 10mA²I OUT²1.5A (-1%) (+1%) Line Regulation 1.5V²V INÐVOUT²5.75V; IOUT=10mA 0.02 0.20 % Load Regulation V INÐVOUT=1.5V; 10mA²IOUT²1.5A 0.04 0.4 % (Notes 1 and 2) Dropout Voltage (Note 3) I OUT=1.5A 1.05 1.4 V Current Limit V INÐVOUT=3V; TJ ³ 25¡C 1.6 3.1 A Minimum Load Current (Note 4) V IN=7V ; VAdj=0 0.6 2.0 mA Adjust Pin Current V INÐVOUT=3V; IOUT=10mA 50 100 µA Thermal Regulation (Note 5) 30ms pulse; T A=25¡C 0.002 0.020 %/W Ripple Rejection (Note 5) f=120Hz; I OUT=1.5A; VINÐVOUT=3V; 80 dB VRIPPLE=1VPP Thermal Shutdown (Note 6) 150 180 210 ¡C Thermal Shutdown Hysteresis 25 ¡C (Note 6) Note 1: Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in out- put voltage due to temperature changes must be taken into account separately. Note 2: Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4Ó from the bottom of the package. Note 3: Dropout voltage is a measurement of the minimum input/output differential at full load. Note 4: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum requirement. Note 5: Guaranteed by design, not 100% tested in production. Note 6: Thermal shutdown is 100% functionally tested in production. D2PAK TO-220 SOT-223 1 1 1 Adj Adjust pin (low side of the internal reference. 22 2 V OUT Regulated output voltage (case). 33 3 V IN Input voltage

0.75 0.80 0.85 0.90 0.95 1.00 1.05 IOUT (mA) V Drop Out (V) TCASE 0ûC TCASE 125ûC TCASE 25ûC 0 10 130 -0.12 0.10 Output Voltage Deviation (%) TJ (°C) 20 30 40 50 60 70 80 90 100 110 120 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 0.025 0.000 0.050 0.075 0.100 01 2 Output Current (A) Output Voltage Deviation (%) TCASE = 0°C TCASE = 125°C TCASE = 25°C Dropout Voltage vs. Output Current Reference Voltage vs. Temperature Load Regulation vs. Output Current 12 345 6 0.40 Minimum Load Current (mA) VIN – VOUT (V) 0.45 0.50 0.55 0.60 0.65 TCASE = 0°C TCASE = 125°C TCASE = 25°C CIN =COUT =22mF Tantalum Minimum Load Current vs VIN-VOUT Error Amplifier Output Current Limit VIN VOUT Adj Thermal Shutdown Bandgap Typical Performance Characteristics

The CS52015-1 linear regulator provides adjustable volt- ages at currents up to 1.5A. The regulator is protected against overcurrent conditions and includes thermal shutdown. The CS52015-1 has a composite PNP-NPN output transistor and requires an output capacitor for stability. A detailed procedure for selecting this capacitor is included in the Stability Considerations section. The 52015-1 has an output voltage range of 1.25V to 5.5V. An external resistor divider sets the output voltage as shown in Figure 1. The regulator maintains a fixed 1.25V (typical) reference between the output pin and the adjust pin. A resistor divider network R1 and R2 causes a fixed cur- rent to flow to ground. This current creates a voltage across R2 that adds to the 1.25V across R1 and sets the overall output voltage. The adjust pin current (typically 50µA) also flows through R2 and adds a small error that should be taken into account if precise adjustment of V OUT is necessary. The output voltage is set according to the formula: VOUT = VREF ´ () + IAdj ´ R2 The term IAdj ´ R2 represents the error added by the adjust pin current. R1 is chosen so that the minimum load current is at least 2mA. R1 and R2 should be the same type, e.g. metal film for best tracking over temperature. While not required, a bypass capacitor from the adjust pin to ground will improve ripple rejection and transient response. A 0.1µF tantalum capacitor is recommended for Òfirst cutÓ design. Type and value may be varied to obtain optimum perfor- mance vs price. R1 + R2 Adjustable Operation 02 0 3 0 4 0 5 0 6 0 40.0 Adjust Pin Current (mA) Temperature (°C) 45.0 50.0 55.0 60.0 65.0 70.0 90 100 10 70 110 120 130 IO = 10mA 101 Frequency (Hz) Ripple Rejection (dB) 102 103 104 106105 TCASE = 25°C IOUT = 1.5A (VIN Ð VOUT) = 3V VRIPPLE = 1.0VPP CAdj = 0.1mF Adjust Pin Current vs. Temperature Ripple Rejection vs. Frequency 02 3 4 5 6 750 Voltage Deviation (mV) -100 100 200 Time mS Load Step (mA) 10981 1500 -200 VOUT=3.3V COUT =CIN =22mF Tantalum CAdj =0.1mF Transient Response 1.5 2.5 3.0 3.5 1.5 ISC (A) VIN - VOUT (V) 1.7 1.9 2.1 2.3 3.1 3.3 1.0 4.0 2.5 2.7 2.9 3.5 Short Circuit Current vs VIN-VOUT Typical Performance Characteristics

Thermal Data TO-220 D 2PAK SOT-223 RQJC typ 3.5 3.5 15 ûC/W RQJA typ 50 10 - 50* 156 ûC/W *Depending on thermal properties of substrate.RQJA = RQJC + RQCA Part Number Type Description CS52015-1GT3 1.5A, adj. output 3 L TO-220 Straight CS52015-1GDP3 1.5A, adj. output 3 L D 2PAK CS52015-1GDPR3 1.5A, adj. output 3 L D 2PAK (tape & reel) CS52015-1GST3 1.5A, adj. output SOT-223 CS52015-1GSTR3 1.5A, adj. output SOT-223 (tape & reel)

Ordering Information

Rev. 2/17/98 Package Specification PACKAGE THERMAL DATA CS52015-1 © 1999 Cherry Semiconductor Corporation Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information. PACKAGE DIMENSIONS IN mm (INCHES)

3 Lead D2PAK (DP)

2.54 (.100) REF 10.31 (.406) 10.05 (.396) 8.53 (.336) 8.28 (.326) 0.91 (.036) 0.66 (.026) 1.40 (.055) 1.14 (.045) 4.57 (.180) 4.31 (.170) 1.68 (.066) 1.40 (.055) 2.74(.108) 2.49(.098) 1.40 (.055) 1.14 (.045) 0.10 (.004) 0.00 (.000) .254 (.010) REF 15.75 (.620) 14.73 (.580) 2.79 (.110) 2.29 (.090)

3 Lead TO-220 (T) Straight

5.33 (.210) 4.83 (.190) 2.79 (.110) 2.29 (.090) 1.02 (.040) 0.63 (.025) 0.56 (.022) 0.38 (.014) 1.40 (.055) 1.14 (.045) 4.83 (.190) 4.06 (.160) 6.17 (.243) REF 1.14 (.045) 1.52 (.060) 1.14 (.045) 1.40 (.055) 2.87 (.113) 5.94 (.234) 14.22 (.560) 13.72 (.540) 2.92 (.115) 2.29 (.090) 9.78 (.385) 10.54 (.415) 3.71 (.146) 3.96 (.156) 14.99 (.590) 14.22 (.560)

3 Lead SOT-223 (ST)

10° MAX 1.30 (.051) 1.10 (.043) 4.60 (.181) 2.30 (.090) 1.05 (.041) 0.85 (.033) 7.30 (.287) 6.70 (.264) 3.30 (.130) 3.70 (.146) 3.15 (.124) 2.95 (.116) 6.70 (.264) 6.30 (.248) 1.70 (.067) 1.50 (.060) 0.10 (.004) 0.02 (.001) 0.85 (.033) 0.65 (.026) 0.35 (.014) 0.25 (.010)