View CS8161YTVA5_62982.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

CS8161
CS8161
12V, 5V Low Dropout Dual Regulator with ENABLE
Description
The CS8161 is a 12V/5V dual output linear regulator. The 12V 5% output sources 400mA and the 5V 2.0% output sources 200mA. The on board ENABLE function controls the regulatorOs two outputs. When the ENABLE pin is low, the regulator is placed in SLEEP mode. Both outputs are disabled and the regulator draws only 200nA of quiescent current. The primary output, VOUT1 is protected against overvoltage conditions. Both outputs are protected against short circuit and thermal runaway conditions. The CS8161 is packaged in a 5 lead TO220 with copper tab. The copper tab can be connected to a heat sink if necessary. It is also available in a 16 lead SO wide package.
Features
s Two regulated outputs 12V 5.0%; 400mA 5V 2.0%; 200mA s Very low SLEEP mode current drain 200nA s Fault Protection Reverse Battery (-15V) 74V Load Dump -100V Reverse Transient Short Circuit Thermal Shutdown
Absolute Maximum Ratings Input Voltage Operating Range .....................................................................15V to 26V Overvoltage Protection.........................................................................74V Internal Power Dissipation ..................................................Internally Limited Junction Temperature Range.......................................................40C +150C Storage Temperature Range....................................................65C to +150C Lead Temperature Soldering Wave Solder (through hole styles only)..........10 sec. max, 260C peak Reflow (SMD styles only)...........60 sec. max above 183C, 230C peak ESD (Human Body Model) ...........................................................................2kV
Package Options
TO-220 5 Lead
Tab (Gnd)
Block Diagram
1 2 3 4 5
VIN VOUT1 Gnd ENABLE VOUT2
V IN + Pre-Regulator Anti-saturation and Current Limit
V OUT 2
1
ENABLE
+ -
16 Lead SO Wide (internally fused leads)
NC
V OUT 1
1
Gnd Gnd NC Gnd Gnd SENSE1 VOUT(2) NC
NC VIN
Gnd Bandgap Reference
Over Voltage Shutdown + Thermal Shutdown Anti-saturation and Current Limit
Gnd Gnd VOUT(1) SENSE1 ENABLE
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
Rev. 4/5/99
1
A
Company
CS8161
Electrical Characteristics for VOUT: 6V VIN 26V, IOUT1 = 5mA, IOUT2 = 5mA, -40C TJ +150uC, -40C TA +125uC; unless otherwise specified.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
s Primary Output Stage(VOUT1) Output Voltage, VOUT1 Dropout Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Current Limit Reverse Polarity Input Voltage, DC Reverse Polarity Input Voltage, Transient Over-voltage Shutdown Short Circuit Current s Secondary Output (VOUT2) Output Voltage, (VOUT2) Dropout Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Current Limit Short Circuit Current s ENABLE Function (ENABLE) Input ENABLE Threshold Input ENABLE Current VOUT1 Off VOUT1 On VENABLE=5.5V VENABLE<0.8V 2.00 80 -10 1.30 1.30 0.80 500 10 V V A A 6VVIN26V, IOUT2200mA IOUT2 200mA 6VVIN26V, 1mAIOUT200mA 1mAIOUT2200mA, 9VIN=14V IOUT2 =50mA IOUT2 =200mA f=120Hz; IOUT=10mA, VIN=15V, 2VRMS 42 200 600 400 5 20 4.90 0.35 5.10 0.60 50 50 10 35 V V mV mV mA mA dB mA mA VOUT1 -0.6V, 101/2 Load 1% Duty Cycle, t=100ms, VOUT-6V, 101/2 Load 28 13VVIN26V, IOUT1400mA IOUT1=400mA 13VVIN20V,5mA IOUT<400mA 5mA IOUT1400mA, VIN=14V IOUT1 =100mA, No Load on VOUT2 IOUT1 =400mA, No Load on VOUT2 f=120Hz, IOUT=300A, VIN=15.0VDC, 2VRMS 42 0.40 -30 -80 34 1.0 -18 -50 45 700 8 50 11.4 12.0 0.35 12.6 0.6 80 80 12 75 V V mV mV mA mA dB A V V V mA
s Other Features Sleep Mode Thermal Shutdown Quiescent Current in Dropout IOUT1=100mA, IOUT2=50mA VENABLE<0.4V 150 0.2 50 210 60 A C mA
2
CS8161
Package Pin Description
PACKAGE PIN # PIN SYMBOL FUNCTION
5 L TO-220 1 2 3 4 5 N/A
16L SO Wide 3 6 4,5,12,13,15,16 8 10 7 VIN VOUT1 Gnd ENABLE VOUT2 Sense1 Supply voltage, usually direct from battery. Regulated output 12V, 400mA (typ) Ground connection. CMOS compatible input pin; switches outputs on and off. When ENABLE is high VOUT1 and VOUT2 are active. Output 5V, 200mA (typ). Kelvin connection that allows remote sensing of V OUT 1 for improved regulation. If remote sensing is not required, connect to VOUT1. Kelvin connection that allows remote sensing of V OUT 2 for improved regulation. If remote sensing is not required, connect to VOUT2. No Connection
N/A
11
Sense2
N/A
1,2,9,14
NC
Typical Performance Characteristics
Output Voltage vs. Temperature for VOUT1
10
VIN = 14V IOUT1 = 5A
Line Regulation vs. Output Current for VOUT1
12.150 12.110 12.070
5 0 Line Regulation (mV) -5 -10 -15 -20 -25 -30 -35 -40
VIN = 13 - 26V
12.030 11.990 Volt 1 11.950 11.910 11.870 11.830 11.790 11.750 -40 -20 0 20 40 60 80 100 120 140 160 Temperature (Deg. C)
25C 125C -40C
0
50
100
150
200
250
300
350
400
450
500
Output Current (mA)
Load Regulation vs. Output Current for VOUT1
15 10 5 Load Regulation (mV) 0 -5 -10 -15 -20 -30 -35 -40 0 50 100 150 200 250 300 350 400 450 500 Output Current (mA) 125C
10 0
Quiescent Current vs. Output Current for VOUT1
VIN = 14.0V -40C 25C
Quiescent Current (mA)
100 90 80 70 60 50 40 30 20 VIN = 14.0V No Load on VOUT2 125C -40C 25C
0
50
100
150
200
250
300
350
400
450
500
Output Current (mA)
3
CS8161
Typical Performance Characteristics: continued
Dropout Voltage vs. Output Voltage for VOUT1
600 VIN = 11V 550 500 125C
Quiescent Current vs Output Current @ Dropout for VOUT1
150 140 130 120 Quiescent Current (mA)
25C
VIN = 11.0V No Load on VOUT2
-40C 25C 125C
450 Dropout Voltage (mV) 400 350 300 250 200 150 100 50 0 0 50 100 150 250 300 200 Output Current (mA) 350 400
110 100 90 80 70 60 50 40 30 20 10 0
-40C
450
500
0
50
100
150
200
250
300
350
400
450
500
Output Current (mA)
Output Voltage vs. Temperature for VOUT2
5.025 5.020 5.015
Load Regulation (mV) 3
Line Regulation vs Output Current for VOUT2
VIN = 14V IOUT = 5mA
VIN = 6 - 26V 2 1 0 -1 -2 -3 -4 -5 -6 125C -7 -40C 25C 250
5.010 Output Voltage 5.005 5.000 4.995 4.990 4.985 4.980 4.975 -40 -20 0 20 40 60 80 100 120 140 160 Temperature (Deg. C)
-8 0 25 50 75 100 125 150 175 200 225 Output Current (mA)
Load Regulation vs Output Current for VOUT2
8 6 4 2 Load Regulation (mV) 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 0 25 50 75 100 125 150 175 200 225 250 Output Current (mA) 125C 25C VIN = 14.0V -40C
Quiescent Current vs Output Current for VOUT2
50 45 Quiescent Current (mA) 40 35 30 25 20 15 10 5 0 0 25 50 75 100 125 150 175 200 225 250 Output Current (mA) 125C -40C 25C VIN = 14.0V No Load on VOUT1
4
CS8161
Typical Performance Characteristics: continued
Dropout Voltage vs. Output Current for VOUT2
800 750 700 650 600 Dropout Voltage (mV) 550 500 450 350 300 250 200 150 100 50 0 0 25 50 75 100 125 150 175 200 225 250 Output Current (mA) 25C
Quiescent Current (mA)
Quiescent Current vs. Output Current @ Dropout for VOUT2
60
VIN = 4.0V No Load on VOUT1
125C
VIN = 4.0V 55 50
-40C
125C
-40C
45 40 35 30 25 20 15 10 5 0 0 25 50 75 125 150 100 Output Current (mA) 175 200 225 250 25C
Enable Threshold Voltage vs. Temperature
1.305 VIN = 14.0V 1.300 ENABLE Voltage
ENABLE Current vs. ENABLE Voltage
Cursor ( 1.8500V, 253.9nA.) Marker ( 1.8500V, 253.9nA.) 100
12mA ENABLE Current vs. ENABLE Voltage
5.0
4.0
I ENABLE
80
IENABLE
1.295
3.0
60
2.0
40
1.290
1.0
1.285 -40 -20 0 20 40 60 80 Temperature (Deg. C) 100 120 140
20
0
0.0 0.0
0 1 2 3 4 5 VENABLE (V)
5
10 VENABLE
15
20
25
Definition of Terms Dropout Voltage: The input-output voltage differential at which the circuit ceases to regulate against further reduction in input voltage. Measured when the output voltage has dropped 100mV from the nominal value obtained at 14V input, dropout voltage is dependent upon load current and junction temperature. Input Voltage: The DC voltage applied to the input terminals with respect to ground. Input Output Differential: The voltage difference between the unregulated input voltage and the regulated output voltage for which the regulator will operate. Line Regulation: The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. Load Regulation: The change in output voltage for a change in load current at constant chip temperature. Long Term Stability: Output voltage stability under accelerated life-test conditions after 1000 hours with maximum rated voltage and junction temperature. Output Noise Voltage: The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Quiescent Current: The part of the positive input current that does not contribute to the positive load current. i.e., the regulator ground lead current. Ripple Rejection: The ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage. Temperature Stability of VOUT: The percentage change in output voltage for a thermal variation from room temperature to either temperature extreme. 5
CS8161
Typical Circuit Waveform
60V VIN 14V 31V 3V 26V 14V
ENABLE
2.0V 0.8V 12V 12V 2.4V 12V 0V 0V 0V 5V 2.4V 0V 0V 5V 12V 0V 5V 12V 0V
VOUT1 VOUT2
System Condition
Turn On
Load Dump
Low VIN
Line Noise, Etc.
VOUT1 Short Circuit
VOUT2 Short Circuit
Thermal Shutdown VOUT1
Turn Off
Application Diagram
C1 * 0.1 mF
Display VIN VOUT1 +
C2** 22mF
CS8161
ENABLE
Gnd
VOUT2 + C3** 22mF
Tuner
NOTES: * C1 required if regulator is located far from power supply filter. ** C2, C3 required for stability, value may be increased. Capacitor must operate at minimum temperature expected.
Application Notes Since both outputs are controlled by the same ENABLE, the CS8161 is ideal for applications where a sleep mode is required. Using the CS8161, a section of circuitry such as a display and nonessential 5V circuits can be shut down under microprocessor control to conserve energy. The example in the Applications Diagram shows an automotive radio application where the display is powered by the 12V on VOUT1 and the Tuner IC is powered by the 5V on VOUT2. Neither output is required unless both the ignition and the Radio On/Off switch are on.
Stability Considerations
The capacitor value and type should be based on cost, availability, size and temperature constraints. A tantalum or aluminum electrolytic capacitor is best, since a film or ceramic capacitor with almost zero ESR, can cause instability. The aluminum electrolytic capacitor is the least expensive solution, but, if the circuit operates at low temperatures (-25C to -40C), both the value and ESR of the capacitor will vary considerably. The capacitor manufacturers data sheet usually provide this information. The values for the output capacitors C2 and C3 shown in the Applications Circuit should work for most applications, however it is not necessarily the best solution. To determine an acceptable value for C2 and C3 for a particular application, start with tantalum capacitors of the recommended value on each output and work towards less expensive alternative parts for each output in turn. 6
The output compensation capacitor (Application diagram C2 and C3) helps determine three main characteristics of a linear regulator: start-up delay, load transient response and loop stability.
CS8161
Application Notes: continued Step 1: Place the completed circuit with a tantalum capacitor of the recommended value in an environmental chamber at the lowest specified operating temperature and monitor the outputs on the oscilloscope. A decade box connected in series with the capacitor C2 will simulate the higher ESR of an aluminum capacitor. (Leave the decade box outside the chamber, the small resistance added by the longer leads is negligible) Step 2: With the input voltage at its maximum value, increase the load current slowly from zero to full load while observing the output for any oscillations. If no oscillations are observed, the capacitor is large enough to ensure a stable design under steady state conditions. Step 3: Increase the ESR of the capacitor from zero using the decade box and vary the load current until oscillations appear. Record the values of load current and ESR that cause the greatest oscillation. This represents the worst case load conditions for the regulator at low temperature. Step 4: Maintain the worst case load conditions set in step 3 and vary the input voltage until the oscillations increase. This point represents the worst case input voltage conditions. Step 5: If the capacitor C2 is adequate, repeat steps 3 and 4 with the next smaller valued capacitor. (A smaller capacitor will usually cost less and occupy less board space.) If the capacitor oscillates within the range of expected operating conditions, repeat steps 3 and 4 with the next larger standard capacitor value. Step 6: Test the load transient response by switching in various loads at several frequencies to simulate its real work environment. Vary the ESR to reduce ringing. Step 7: Remove the unit from the environmental chamber and heat the IC with a heat gun. Vary the load current as instructed in step 5 to test for any oscillations. Once the minimum capacitor value with the maximum ESR is found, a safety factor should be added to allow for the tolerance of the capacitor and any variations in regulator performance. Most good quality aluminum electrolytic capacitors have a tolerance of +/-20% so the minimum value found should be increased by at least 50% to allow for this tolerance plus the variation which will occur at low temperatures. The ESR of the capacitor should be less than 50% of the maximum allowable ESR found in step 3 above. Once the value for C2 is determined, repeat the steps to determine the appropriate value for C3. 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 P D(max) is known, the maximum permissible value of RQJA can be calculated: RQJA = 150C - TA PD (2)
The value of RQJA can then be compared with those in the package section of the data sheet. Those packages with RQJA's less than the calculated value in equation 2 will keep the die temperature below 150C. In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heatsink will be required.
IIN VIN
Smart Regulator
IOUT1 VOUT1 IOUT2
}
Control Features
VOUT2
IQ
Figure 1: Dual output regulator with key performance parameters labeled.
Heat Sinks
A heat sink effectively increases the surface area of the package to improve the flow of heat away from the IC and into the surrounding air. Each material in the heat flow path between the IC and the outside environment will have a thermal resistance. Like series electrical resistances, these resistances are summed to determine the value of RQJA. RQJA = RQJC + RQCS + RQSA (3) where RQJC = the junctiontocase thermal resistance, RQCS = the casetoheatsink thermal resistance, and RQSA = the heatsinktoambient thermal resistance. RQJC appears in the package section of the data sheet. Like RQJA, it too is a function of package type. RQCS and RQSA are functions of the package type, heatsink and the interface between them. These values appear in heat sink data sheets of heat sink manufacturers. 7
Calculating Power Dissipation in a Dual Output Linear Regulator
The maximum power dissipation for a dual output regulator (Figure 1) is PD(max) = {VIN(max)VOUT1(min)}IOUT1(max)+ {VIN(max)VOUT2(min)}IOUT2(max)+VIN(max)IQ Where VIN(max) is the maximum input voltage, VOUT1(min) is the minimum output voltage from VOUT1, (1)
CS8161
Package Specification
PACKAGE DIMENSIONS IN mm(INCHES) PACKAGE THERMAL DATA
D Lead Count 16L SO Wide
(internally fused leads)
Thermal Data English Min .398 RQJC RQJA typ typ
Metric Max 10.50 Min 10.10
Max .413
5L TO-220 2.0 50
16L SO Wide 18 75
uC/W uC/W
5 Lead TO-220 (THA) Horizontal Surface Mount Wide Body (DW); 300 mil wide
10.54 (.415) 9.78 (.385) 2.87 (.113) 2.62 (.103) 1.40 (.055) 3.96 (.156) 3.71 (.146) 1.14 (.045) 4.83 (.190) 4.06 (.160)
7.60 (.299) 7.40 (.291)
10.65 (.419) 10.00 (.394)
6.55 (.258) 5.94 (.234)
14.99 (.590) 14.22 (.560)
0.51 (.020) 0.33 (.013)
1.27 (.050) BSC
6.83 (.269)
2.77 (.109)
2.49 (.098) 2.24 (.088)
2.65 (.104) 2.35 (.093)
0.81(.032)
1.68 (.066) TYP 1.70 (.067) 6.81(.268)
0.56 (.022) 0.36 (.014) 6.60 (.260) 5.84 (.230)
2.92 (.115) 2.29 (.090)
1.27 (.050) 0.40 (.016)
REF: JEDEC MS-013
0.32 (.013) 0.23 (.009) D 0.30 (.012) 0.10 (.004)
5 Lead TO-220 (T) Straight
5 Lead TO-220 (TVA) Vertical
10.54 (.415) 9.78 (.385) 2.87 (.113) 6.55 (.258) 2.62 (.103) 5.94 (.234) 4.83 (.190) 4.06 (.160) 3.96 (.156) 3.71 (.146) 1.40 (.055) 1.14 (.045)
3.96 (.156) 3.71 (.146) 4.83 (.190) 4.06 (.160) 10.54 (.415) 9.78 (.385)
1.40 (.055) 1.14 (.045)
14.99 (.590) 14.22 (.560)
6.55 (.258) 5.94 (.234) 2.87 (.113) 2.62 (.103) 14.99 (.590) 14.22 (.560)
14.22 (.560) 13.72 (.540)
8.64 (.340) 7.87 (.310)
1.78 (.070) 2.92 (.115) 2.29 (.090)
1.02 (.040) 0.76 (.030)
4.34 (.171) 1.68 (.066) typ 6.80 (.268) 0.56 (.022) 0.36 (.014) 7.51 (.296)
1.70 (.067)
1.02(.040) 0.63(.025) 6.93(.273) 6.68(.263)
1.83(.072) 1.57(.062)
0.56 (.022) 0.36 (.014) 2.92 (.115) 2.29 (.090)
.94 (.037) .69 (.027)
Ordering Information
Part Number CS8161YT5 CS8161YTVA5 CS8161YTHA5 CS8161YDWF16 CS8161YDWFR16
Rev. 4/5/99
Description 5L TO-220 Straight 5L TO-220 Vertical 5L TO-220 Horizontal 16L SO Wide 16L SO Wide (tape & reel) 8
Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information.
(c) 1999 Cherry Semiconductor Corporation

▲Up To Search▲

Price & Availability of CS8161YTVA5

	To Download CS8161YTVA5 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .