CS8361

CS8361 CHERRY | Alldatasheet

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Technical content

Features

5V,100mA,2% ENABLE RESET BG n 2 Regulated Outputs Standby Output 5V ±2%; 100mA Tracking Output 5V; 250mA n Low Dropout Voltage (0.4V at rated current) n RESET Option n ENABLE Option n Low Quiescent Current n Protection Features Independent Thermal Shutdown Short Circuit 60V Load Dump Reverse Battery Package Options 7L TO-220 CS8361 5V Dual Micropower Low Dropout Regulator with ENABLE and RESET CS8361 Block Diagram

Description

16 Lead PDIP & SOIC Wide

(internally fused leads) NC NC NC NC NC NC VIN Gnd Gnd Gnd Gnd VTRK Adj ENABLE RESET VSTBY 1. VSTBY 2. VIN 3. VTRK 4. Gnd 5. Adj 6. ENABLE 7. RESET Also available in 20 Lead SOIC Wide. Consult factory for 20 Lead PSOP . * Consult factory for positive ENABLE option. Rev. 5/4/99 The CS8361 is a precision micro- power dual voltage regulator with and . The 5V standby output is accurate within ±2% while supplying loads of 100mA and has a typical dropout voltage of 400mV. Quiescent current is low, typically 140µA with a 300µA load. The active output monitors the 5V standby output and holds the line low during power- up and regulator dropout condi- tions. The circuit includes hysteresis and is guaranteed to operate correctly with 1V on the standby output. The second output tracks the 5V standby output through an external adjust lead, and can supply loads of 250mA with a typical dropout voltage of 400mV. The logic level lead is used to control this tracking regulator output. Both outputs are protected against overvoltage, short circuit, reverse battery and overtemperature condi- tions. The robustness and low qui- escent current of the CS8361 makes it not only well suited for automo- tive microprocessor applications, but for any battery powered micro- processor applications. ENABLE RESET RESET RESET RESETENABLE Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ®

unless otherwise specified. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CS8361 Absolute Maximum Ratings Lead Temperature Soldering RESETENABLE n Tracking Output (VTRK) VSTBY Ð VTRK, 6V ² V IN ² 26V -25 +25 mV VTRK Tracking Error 100µA ² I TRK ² 250mA (note 1) Adjust Pin Current, IAdj Loop in Regulation 1.5 5 µA Line Regulation 6V ² V IN ² 26V (note 1) 5 50 mV Load Regulation 100µA ² I TRK ² 250mA (note 1) 5 50 mV Dropout Voltage (VIN Ð VTRK) I TRK = 100µA 100 150 mV ITRK = 250mA 400 700 mV Current Limit V IN = 12V, VTRK = 4.5 275 500 mA Quiescent Current V IN = 12V, ITRK = 250mA 25 50 mA No Load on VSTBY Reverse Current V TRK = 5V, VIN = 0V 200 1500 µA Ripple Rejection f = 120Hz, I TRK = 250mA 60 70 dB 7V ² VIN ² 17V n Standby Output (VSTBY) Output Voltage, VSTBY 6V ² VIN ² 26V 4.90 5.00 5.10 V 100µA ² ISTBY ² 100mA Line Regulation 6V ² V IN ² 26V 5 50 mV Load Regulation 100µA ² I STBY ² 100mA 5 50 mV Dropout Voltage (VIN Ð VSTBY) I STBY = 100µA 100 150 mV ISTBY = 100mA 400 600 mV Current Limit V IN = 12V, VSTBY = 4.5V 125 200 mA Short Circuit Current V IN = 12V, VSTBY = 0V 10 100 mA Quiescent Current V IN = 12V, ISTBY = 100mA 10 20 mA ITRK = 0mA VIN = 12V, ISTBY = 300µA 140 200 µA ITRK = 0mA Reverse Current V STBY = 5V, VIN = 0V 100 200 µA Ripple Rejection f = 120Hz, I STBY = 100mA 60 70 dB 7V ² VIN ² 17V Note 1: VTRK connected to Adj lead. VTRK can be set to higher values by using an external resistor divider.

PACKAGE LEAD # LEAD SYMBOL FUNCTION unless otherwise specified. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT n Functions Input Threshold 0.8 1.2 2.0 V Input Bias Current V ENABLE = 0V to 10V -10 0 10 µA Threshold High (VRH)V STBY Increasing 4.59 4.87 V STBY-0.02 V Hysteresis 60 120 180 mV Threshold Low (V RL)V STBY Decreasing 4.53 4.75 V STBY-0.08 V Leakage 25 µA Output Voltage Low (VRLO); RRST = 10k½ 1V ² VS TBY ²V RL 0.1 0.4 V Low (VRPEAK)V STBY, Power Up, Power Down 0.6 1.0 V n Protection Circuitry (Both Outputs) Independent Thermal Shutdown V STBY 150 180 ¡C VTRK 150 165 ¡C Overvoltage Shutdown 30 34 38 V RESET RESET RESET RESET ENABLE ENABLE ENABLERESET 16L PDIP & SO 20L SO Wide 7L 7L Wide (Internally (Internally TO-220 D 2PAK Fused Leads) Fused Leads) 1 1 16 20 V STBY Standby output voltage delivering 100mA. 22 1 1 V IN Input voltage. 33 3 2 V TRK Tracking output voltage controlled by delivering 250mA. 4 4 4,5,12,13 4,5,6,7 Gnd Reference ground connection. 14,15,16,17 5 5 6 8 Adj Resistor divider from V TRK to Adj. Sets the output voltage on VTRK. If tied to VTRK, VTRK will track VSTBY. 66 8 10 Provides on/ off control of the tracking output, active LOW. 7 7 9 11 CMOS compatible output lead that goes low whenever VSTBY falls out of regulation. 2,7,10, 3,9,12,13, NC No Connection. 11,14,15 18,19 RESET ENABLE ENABLE

The function switches the output transistor for VTRK on and off. When the lead voltage exceeds 1.4V(typ), VTRK turns off. This input has several hundred millivolts of hysteresis to prevent spurious output activity during power-up or power-down. The is an open collector NPN transistor, con- trolled by a low voltage detection circuit sensing the V STBY (5V) output voltage. This circuit guarantees the output stays below 1V (0.1V typ) when V STBY is as low as 1V to ensure reliable operation of microprocessor-based systems. This output uses the same type of output device as V STBY, but is rated for 250mA. The output is configured as a tracking regulator of the standby output. By using the standby output as a voltage reference, giving the user an external programming lead (Adj lead), output voltages from 5V to 20V are easily realized. The programming is done with a simple resistor divider (Figure 2), and follow- ing the formula: V TRK = VSTBY ´ (1 + R1/R2) + IAdj ´ R1 If another 5V output is needed, simply connect the Adj lead to the VTRK output lead. VTRK Output Voltage RESET RESET RESET Function ENABLE ENABLE ENABLE Function Output capacitors for the CS8361 are required for stability. Without them, the regulator outputs will oscillate. Actual size and type may vary depending upon the application load and temperature range. Capacitor effective series resistance (ESR) is also a factor in the IC stability. Worst- case is determined at the minimum ambient temperature and maximum load expected. Output capacitors can be increased in size to any desired value above the minimum. One possible purpose of this would be to maintain the output voltages during brief conditions of negative input transients that might be char- acteristic of a particular system. Capacitors must also be rated at all ambient temperatures expected in the system. To maintain regulator stability down to -40ûC, capacitors rated at that temperature must be used. More information on capacitor selection for Smart Regulatorsª is available in the Smart Regulator applica- tion note, ÒCompensation for Linear Regulators.Ó The maximum power dissipation for a dual output regula- tor (Figure 1) is: PD(max) = {VIN(max)ÐVOUT1(min)}IOUT1(max)+ {VIN(max)ÐVOUT2(min)}IOUT2(max)+VIN(max)IQ (1) Where VIN(max) is the maximum input voltage, VOUT1(min) is the minimum output voltage from VOUT1, VOUT2(min) is the minimum output voltage from VOUT2, IOUT1(max) is the maximum output current, for the application IOUT2(max) is the maximum output current, for the application IQ is the quiescent current the regulator consumes at IOUT(max). Once the value of PD(max) is known, the maximum per- missible value of RQJA can be calculated: RQJA = (2) The value of RQJA can then be compared with those in the package section of the data sheet. Those packages with R QJA's less than the calculated value in equation 2 will keep the die temperature below 150¡C. In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heat sink will be required. Figure 1: Dual output regulator with key performance parameters labeled. VIN VOUT 2 IIN IQ Control Features} IOUT 2 VOUT 1 IOUT 1 Smart Regulator 150¡C - TA PD Calculating Power Dissipation in a Dual Output Linear Regulator External Capacitors

D Lead Count Metric English Max Min Max Min 16L PDIP 19.69 18.67 .775 .735 16L SO Wide* 10.50 10.10 .413 .398 20L SO Wide* 13.00 12.60 .512 .496 Part Number Description CS8361YDPS7 7L D 2PAK short-leaded CS8361YDPSR7 7L D 2PAK short-leaded, (tape & reel) CS8361YT7 7L TO-220 (Straight) CS8361YDWF16 16L SO Wide * CS8361YDWFR16 16L SO Wide *, (tape & reel) CS8361YN16 16L PDIP CS8361YDW20 20L SO Wide* CS8361YDWR20 20L SO Wide*, (tape & reel)

Ordering Information

Rev. 5/4/99 © 1999 Cherry Semiconductor Corporation CS8361 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 Specification PACKAGE DIMENSIONS IN mm(INCHES) PACKAGE THERMAL DATA Thermal Data typ R QJA RQJC ûC/W 7L D2PAK 10-50 ** 3.5 7L TO-220 50 3.5 16L PDIP 80 42 16L SO Wide* 75 18 20L SO Wide* 55 9 ** Depending on thermal properties of substrate. RQJA = RQJC + RQCA Plastic DIP (N); 300 mil wide 0.39 (.015) MIN. 1.14 (.045) D Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same. .203 (.008) .356 (.014) REF: JEDEC MS-001 3.68 (.145) 2.92 (.115) 8.26 (.325) 7.62 (.300) 7.11 (.280) 6.10 (.240) .356 (.014) .558 (.022) Surface Mount Wide Body (DW); 300 mil wide 1.27 (.050) BSC 7.60 (.299) 7.40 (.291) 10.65 (.419) 10.00 (.394) D 0.32 (.013) 0.23 (.009) 1.27 (.050) 0.40 (.016) REF: JEDEC MS-013 2.49 (.098) 2.24 (.088) 0.51 (.020) 2.35 (.093) 0.30 (.012) 0.10 (.004) * Internally Fused Leads

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) *CHERRY SEMICONDUCTOR SHORT-LEADED FOOTPRINT

7 Lead TO-220 (T) Straight

2.87 (.113) 2.62 (.103) 9.78 (.385) 10.54 (.415) 1.40 (.055) 1.14 (.045) 0.64 (.025) 0.38 (.015) 0.56 (.022) 0.36 (.014) 1.40 (.055) 1.14 (.045) 4.83 (.190) 4.06 (.160) 14.22 (.560) 13.72 (.540) 0.94 (.037) 0.58 (.023) 7.75 (.305) 7.49 (.295) 2.92 (.115) 2.29 (.090) 3.71 (.146) 14.22 (.560) 6.55 (.258) 5.94 (.234)