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150mA Low Dropout Voltage Regulators
CORPORATION
CLM2950 / CLM2951
FEATURES PRODUCT DESCRIPTION Calogic's CLM2950 and CLM2951 are low power voltage regulators. These devices are an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The CLM2950 and CLM2951 features very low quiescent current and very low dropout voltage (Typ. 50mV at light load and 380mV at 100mA). This includes a tight initial tolerance of 0.5% typ., extremely good load and line regulation of 0.05% typ. and very low output temperature coefficient, making the CLM2950/CLM2951 useful as a low-power voltage reference. Other key additional features of this device includes higher output current (150mA), positive transient protection up to 60V (Load dump), and the ability to survive an unregulated input voltage transient of -20V below ground (reverse battery). The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. The CLM2950 is offered in a 3-pin TO-92 package compatible with other 5 volt regulators. The CLM2951 is also available in 8-pin plastic and SO-8. The regulator output voltage may be pin-strapped for a 5V, 3.3V and 3.0 volts or programmed from 1.24 volt to 29 volts with an external pair of resistors. ORDERING INFORMATION PART CLM2950ACN-X CLM2950CN-X CLM2951ACP-X CLM2951CP-X CLM2951ACS-X CLM2951CS-X PACKAGE TEMPERATURE RANGE IND. IND. IND. IND. IND. IND. TO-92 (3-Pin) TO-92 (3-Pin) Plastic DIP (8-Pin) Plastic DIP (8-Pin) Plastic SOIC (8-Pin) Plastic SOIC (8-Pin)
* 5V, 3.3V, and 3.0V Versions at 150mA Output * Very Low Quiescent Current * Low Dropout Voltage and Line Regulation * Extremely Tight Load * Very Low Temperature Coefficient * Needs Only 1F for Stability * Current and Thermal Limiting * Unregulated DC Input can Withstand -20V Reverse Battery and +60V Positive Transients * Similar Replacement for LP2950/LP2951 Sockets * * *
CLM2951 Versions Only Error Flag Warns of Output Dropout Logic-Controlled Electronic Shutdown Output Programmable from 1.24 to 29V
APPLICATIONS
* Battery Powered Systems * Cordless Telephones * Radio Control Systems * Portable / Palm Top / Notebook Computers * Portable Consumer Equipment * Portable Instrumentation * Avionics * Automotive Electronics * SMPS Post-Regulator * Voltage Reference
X = 3.0V, 3.3V or 5.0V
PIN CONNECTIONS
8-PIN SURFACE MOUNT
OUTPUT SENSE SHUTDOWN GROUND 1 2 CLM2951 3 4 TOP VIEW 6 5 5V OR 3.3V TAP ERROR 8 7 INPUT FEEDBACK
TO-92
1 2 3 1. OUTPUT 2. GROUND 3. INPUT
BOTTOM VIEW
1D-46
1D-47
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
ABSOLUTE MAXIMUM RATINGS Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260 oC Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150oC Operating Junction Temperature Range CLM2951 . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150oC CLM2950AC/CLM2950C CLM2951AC/CLM2951C . . . . . . . . . . . . . . . . -40 to +125oC Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . -20 to +60V Feedback Input Voltage . . . . . . . . . . . . . . . . . . . . -1.5 to +30V Shutdown Input Voltage. . . . . . . . . . . . . . . . . . . . -0.3 to +30V Error Comparator Output . . . . . . . . . . . . . . . . . . . -0.3 to +30V ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2KV Min
ELECTRICAL CHARACTERISTICS: VS = 15V, TA = 25oC, unless otherwise specified.
PARAMETER MIN 3V VERSIONS 2.985 Output Voltage 2.964 Output Voltage 3.3V VERSIONS 3.284 Output Voltage 3.260 Output Voltage 5V VERSIONS 4.975 Output Voltage 4.94 Output Voltage ALL VOLTAGE OPTIONS Output Voltage Temperature Coefficient Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 5) Ground Current Current Limit Thermal Regulation Output Noise, 10Hz to 100KHz 8-PIN VERSIONS ONLY Reference Voltage Reference Voltage Feedback Pin Bias Current Reference Voltage Temperature Coefficient Feedback Pin Bias Current Temperature Coefficient 1.22 1.19 40 20 0.1 20 0.03 0.04 50 380 450 150 3 5 130 0.05 430 160 100 CLM2951 1.235 1.25 1.27 60 120 0.1 0.1 80 450 500 170 6 8 200 0.2 20 0.03 0.04 50 380 450 150 3 5 130 0.05 430 160 100 CLM2951AC 1.22 1.19 40 20 0.1 1.235 1.25 1.27 60 0.1 0.1 80 450 500 170 6 8 200 0.2 50 0.04 0.1 50 380 450 150 3 5 130 0.05 0430 160 100 CLM2951C 1.21 1.18 40 50 0.1 1.23 1.26 1.28 60 V V nA ppm/oC nA/oC (Note 7) Over Temperature (Note 6) 0.2 0.2 80 450 500 170 6 8 200 0.2 ppm/oC % % mV mV mV A mA mA mA %/W Vrms Vrms Vrms CL = 1F CL = 200F CL = 13.3F
(Bypass = 0.01F pins 7 to 1 (CLM2951))
CLM2951 TYP 3.0 MAX 3.015 3.036 3.0 3.3 3.045 3.317 3.340 3.3 5.0 3.350 5.025 5.06 5.0 5.075
CLM2950AC CLM2951AC MIN 2.985 2.970 2.964 2.958 3.284 3.267 3.260 3.254 4.975 4.95 4.94 4.93 TYP 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 MAX 3.015 3.030 3.036 3.042 3.317 3.333 3.340 3.346 5.025 5.050 5.06 5.07
CLM2950C CLM2951C MIN 2.970 2.955 2.940 2.928 3.267 3.251 3.234 3.221 4.95 4.925 4.90 4.88 TYP 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 MAX 3.030 3.045 3.060 3.072 3.333 3.350 3.366 3.379 5.05 5.075 5.10 5.12
UNITS
CONDITIONS (Note 2)
V V V V V V V V V V V V
TJ = 25oC -25oC TJ 85oC Full Operating Temperature 100A IL 150mA,TJ TJMAX TJ = 25oC -25oC TJ 85oC Full Operating Temperature 100A IL 150mA, TJ TJMAX TJ = 25oC -25oC TJ 85oC Full Operating Temperature 100A IL 150mA, TJ TJMAX
2.955
3.251
4.925
(Note 1) 6V VIN 30V (Note 4) 100A IL 150mA IL = 100A IL = 100mA IL = 150mA IL = 100A IL = 100mA IL = 150mA VOUT = 0
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
ELECTRICAL CHARACTERISTICS (continued)
PARAMETER MIN ERROR COMPARATOR Output Leakage Current Output Low Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis SHUTDOWN INPUT Input Logic Voltage Shutdown Pin Input Current Regulator Output Current In Shutdown CLM2951 TYP 0.01 150 60 75 15 1.3 2 30 675 3 50 800 10 MAX 1 250 40 95 CLM2950AC CLM2951AC MIN TYP MAX 0.01 150 60 75 15 1.3 2 30 675 3 50 800 10 1 250 40 95 CLM2950C CLM2951C MIN TYP MAX 0.01 150 60 75 15 1.3 2 30 675 3 50 800 10 1 250 95 UNITS CONDITIONS (Note 2)
40
A mV mV mV mV V V A A A
Voh = 30V VIN = 4.5V, IOL = 400A (Note 8) (Note 8) (Note 8) Low (Regulator ON) High (Regulator OFF) VS = 2.4V VS = 30V (Note 9)
0.6
0.7
0.7
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Unless otherwise specified all limits guaranteed for TJ = 25oC, VIN = 6V, I L = 100A and CL = 1F. Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output Sense (VOUT = 5V) and VSHUTDOWN 0.8V. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Line regulation for the CLM2951 is tested at 150oC for IL = 1mA. For IL = 100A and T J = 125oC, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken input account. Note 6: VREF VOUT (VIN - 1V), 2.3 VIN 30V, 100A I L 150mA, TJ T JMAX. Note 7: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temprtature range. Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V OUT/VREF = (R1+R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V/1.235 = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 9: VSHUTDOWN 2V, VIN 30V, VOUT = 0, Feedback pin tied to 5V Tap. Note 10: All typical values are not guaranteed.
BLOCK DIAGRAM
UNREGULATED DC 7 FEEDBACK 8 INPUT 1 OUTPUT 2 SENSE + 3 FROM CMOS OR TTL SHUTDOWN + 60mV + 1.23V REFERENCE GROUND CLM2950 AND CLM2951 BLOCK DIAGRAM
1D-48
+
5V @ 150mA MAX
-
ERROR AMPLIFIER
180k
6 5V TAP 330k + 1F TO CMOS OR TTL
60k + - ERROR DETECTION COMPARATOR
5 ERROR 4
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
APPLICATION HINTS EXTERNAL CAPACITORS
* The stability of the CLM2950/CLM2951 requires a 1.0F or
greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations below -25oC a solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30oC. The ESR of about 5 or less and resonant frequency about 500kHz are the most important parameters in the value of the capacitor. The capacitors value can be increased without limit.
The error comparator has an open-collector output which requires an external pull-up resistor. Depending on the system requirements the resistor may be returned to 5V output or other supply voltage. In determining the value of this resistor, note that the output is rated to sink 400A, this value adds to battery drain in a low battery condition. Suggested values range from 100K to 1M. If the output is unused this resistor is not required. PROGRAMMING THE OUTPUT VOLTAGE OF CLM2951 The CLM2951 may be pin-strapped for 5V using its internal voltage divider by tying Pin 1 (output) to Pin 2 (sense) and Pin 7 (feedback) to Pin 6 (5V Tap). Also, it may be programmed for any output voltage between its 1.235V reference and its 30V maximum rating. As seen in Figure 2, an external pair of resistors is required. Refer to the below equation for the programming of the output voltage: VOUT = VREF x (1 + R1\R2) + IFBR1 The VREF is 1.235 and IFB is the feedback bias current, nominally -20nA. The minimum recommended load current of 1A forces an upper limit of 1.2M on value of R2. If no load is presented the IFB produces an error of typically 2% in VOUT which may be eliminated at room temperature by trimming R1. To improve the accuracy choose the value of R2 = 100k this reduces the error by 0.17% and increases the resistor program current by 12A. Since the CLM2951 typically draws 60A at no load with Pin 2 open-circuited this is a small price to pay. REDUCING OUTPUT NOISE It may be an advantage to reduce the AC noise present at the output. One way is to reduce the regulator bandwidth by increasing the size of the output capacitor. This is the only way that noise can be reduced on CLM2950 but is relatively inefficient, as increasing the capacitor from 1F to 220F only decreases the noise from 430V to 160Vrms for a 100kHz bandwidth at 5V output. Noise could also be reduced fourfold by a bypass capacitor across R1, since it reduces the high frequency gain from 4 to unity. CBYPASS 1/2R1 x 200Hz or choose 0.01F. When doing this, the output capacitor must be increased to 3.3F to maintain stability. These changes reduce the output noise from 430V to 100Vrms for a 100kHz bandwidth at 5V output. With the bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher voltages.
* At lower values of output current, less output capacitance is
required for stability. For currents below 10mA the value of the capacitor can be reduced to 0.5F and 0.15F for 1mA. More output capacitance is needed for the 8-pin version at voltages below 5V since it runs the error amplifier at lower gain.
* At worst case 5F or greater must be used for the condition
of 150mA load at 1.23V output.
* The
CLM2950, unlike other low dropout regulators, will remain stable and in regulation with no load in addition to the internal voltage divider. The feature is especially important in applications like CMOS RAM keep-alive circuits. When setting the output voltage of the CLM2951 version with external resistors, a minimum load of 1A is recommended.
* If
there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the input then a 1A tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. can occur if there is a stray capacitance to the CLM2951 feedback terminal (pin 7). This could cause more problems when using a higher value of external resistors to set the output voltage. This problem can be fixed by adding a 100pF capacitor between output and feedback and increasing the output capacitor to at least 3.3F.
* Instability
ERROR DETECTION COMPARATOR OUTPUT The Comparator produces a logic low output whenever the CLM2951 output falls out of regulation by more than around 5%. This is around 60mV offset divided by the 1.235 reference voltage. This trip level remains 5% below normal regardless of the programmed output voltage of the regulator. Figure 1 shows the timing diagram depicting the ERROR signal and the regulator output voltage as the CLM2951 input is ramped up and down. The ERROR signal becomes low at around 1.3V input, and goes high around 5V input (input voltage at which VOUT = 4.75). Since the CLM2951's dropout voltage is load dependent, the input voltage trip point (around 5V) will vary with the load current. The output voltage trip point (approx. 4.75V) does not vary with load.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
TYPICAL PERFORMANCE CHARACTERISTICS
SHUTDOWN THRESHOLD VOLTAGE (V)
1.8 1.6 1.4 1.2 1.0 0.8
SHUTDOWN THRESHOLD VOLTAGE
OUTPUT VOLTAGE CHANGE (mV)
OUTPUT CURRENT (mA)
30 25 20 15 10 TJ = 150C 5 0
LINE REGULATION
IL = 100A IL = 1mA
180 160 140 120 100 80 60 40 20 0 0
RATED OUTPUT CURRENT
8-PIN SOIC SOLDERED TO PC BOARD
TJMAX = 125C VOUT = 5V
TA = 25C TA = 50C TA = 85C 5 10 15 20 25 INPUT VOLTAGE (V) 30
1E-01
0.6 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 1D-49
10 IL = 100A 5 TJ = 125C 0 -5 -10 25 30 5 10 15 20 INPUT VOLTAGE (V) 1D-50
125 OUTPUT VOLTAGE CHANGE (mV) 100 75 50 25 0 -25 -50 100mA 100A 0
LOAD TRANSIENT RESPONSE
OUTPUT VOLTAGE CHANGE (mV)
80 60 40 20 0 -20 -40 -60 100mA 100A 0
LOAD TRANSIENT RESPONSE
OUTPUT VOLTAGE (V)
7 6 5 4 3 2
ENABLE TRANSIENT
CL = 1.5F
IL = 10mA VIN = 8V CL = 10F VOUT = 5V
LOAD CURRENT
LOAD CURRENT
CL = 4.7F VOUT = 5V
CL = 15F VOUT = 5V
SHUTDOWN PIN VOLTAGE (V)
1 0 2 0 -2 -100 0
2
4 6 TIME (mS)
8
10
1E-02
4
8 12 TIME (mS)
16
20
1E-03
100 200 300 400 500 600 700 TIME (s) 1E-04
8 COMPARATOR OUTPUT (V)
ERROR COMPARATOR OUTPUT
VOUT = 5V SINK CURRENT (mA)
2.5
COMPARATOR SINK CURRENT
TA = 125C
400mV OUTPUT VOLTAGE CHANGE 200mV 0
LINE TRANSIENT RESPONSE
6
2.0
4 HYSTERESIS 2
1.5
TA = 25C
-50mV 8V 6V 4V 0 200 400
CL = 4.7F IL = 1mA VOUT = 5V
1.0 TA = -55C 0.5
0
NOTE: PULLUP RESISTOR TO SEPARATE 5V SUPPLY
-2 0
1
2 3 4 5 INPUT VOLTAGE (V)
6
1E-05
0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1E-06
INPUT VOLTAGE
600
800
1E-07
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MINIMUM OPERATING VOLTAGE (V)
2.2 2.1 2.0 1.9 1.8 1.7
MINIMUM OPERATING VOLTAGE
5.06 5.04 5.02 5.0 4.98 4.96
OUTPUT VOLTAGE vs TEMPERATURE OF 3 REPRESENTATIVE UNITS
QUIESCENT CURRENT (A)
160 140 120 100 80 60 40 20 0 0
GROUND PIN CURRENT
OUTPUT VOLTAGE (V)
IL = 1mA IL = 0
0.2%
1.6 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 1E-08
4.94 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 1E-09
1
2 3 4 5 6 INPUT VOLTAGE (V)
7
8
1E-10
10 OUTPUT IMPEDANCE (OHMS) 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 10
OUTPUT IMPEDANCE
IO = 100A IO = 1mA IO = 100mA
90 RIPPLE REJECTION (dB) 80 70 60 50 40
RIPPLE REJECTION
90 RIPPLE REJECTION (dB) 80 70 60 50 40 30
RIPPLE REJECTION
CL = 1.5F VIN = 6V VOUT = 5V IL = 1mA
IL = 0
VOUT = 5V CL = 4.7F
IL = 100A CL = 1.5F
30 VIN = 6V 100 1K 10K 100K FREQUENCY (Hz) 1M
1E-11
20 101
VOUT = 5V 10 2 103 104 105 106
1E-12
IL = 10mA 20 101 10 2 103 104 105 FREQUENCY (Hz) 106
1E-13
FREQUENCY (Hz)
80 RIPPLE REJECTION (dB) 70
RIPPLE REJECTION
VOLTAGE NOISE SPECTRAL DENSITY (V/ Hz) IL = 50A
3.5 3.0 2.5 2.0 1.5 1.0
0.01mF
OUTPUT NOISE
PIN 2 TO PIN 4 RESISTANCE (k) IL = 100mA CL = 4.7F CL = 220F CL = 3.3F
400
DIVIDER RESISTANCE
60 IL = 100mA 50 40 30 CL = 1.5F 20 VIN = 6V VOUT = 5V 10 101 10 2 103 104 105 FREQUENCY (Hz) 106
1E-14
300
200
100
0.5 BYPASS 0.0 102
PIN 1 TO PIN 7
103 104 FREQUENCY (Hz)
105
1E-15
0 -75 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 1E-16
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
180 160 OUTPUT CURRENT (mA) 140 120 100 80 60 40 20 0 0 5
RAISED OUTPUT
OUTPUT VOLTAGE CHANGE (mV)
TO-92 PACKAGE .25 LEADS SOLDERED TO PC BOARD 150
5 4 2 0 -2 1 0 -1 0
THERMAL RESPONSE
TJMAX = 125C
TA = 25C TA = 85C 10 15 20 25 INPUT VOLTAGE (V) 30
1E-17
POWER DISSIPATION (W)
1.25W
10
20 30 TIME (S)
40
50
1E-18
TYPICAL APPLICATIONS
4.75V OUTPUT VOLTAGE
100K 8 5 +VIN ERROR VOUT 1 1.2 TO 30V +VIN
ERROR*
ERROR OUTPUT
CLM2951 + SHUTDOWN INPUT 3 SD GND FB 7 1.23V V REF R2
1E-20
R1 .01F 4
3.3F
5.0V INPUT VOLTAGE 1.3V
*SEE APPLICATION INFO.
1E-19
FIGURE 1. ERROR OUTPUT TIMING
+VIN
FIGURE 2. ADJUSTABLE REGULATOR
+VIN
470K 5 470K ERROR
8 +VIN VOUT 1 VOUT
8 ERROR OUTPUT 5 +VIN ERROR VOUT 1 *VOUT = VIN
CLM2951 + 3 SD GND 4 FB 7 R1 1F
CLM2951 SHUTDOWN INPUT 3
SD GND 4 FB 7
R2
*MINIMUM INPUT - OUTPUT VOLTAGE RANGES FROM 4mV TO 400mV. DEPENDING ON LOAD CURRENT. CURRENT LIMIT IS TYPICALLY 160mA.
LATCH OFF WHEN ERROR FLAG OCCURS
1E-21
WIDE INPUT VOLTAGE RANGE CURRENT LIMITER
1E-22
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
TYPICAL APPLICATIONS (continued)
+
6V SEALED LEADACID BATTERY SOURCE
120K
1.5K IN457
8 +VIN VOUT CLM2951 1 MAIN V-
FB
CLM385
400K FOR 5.5V 100K 3 SD GND 4
MEMORY V+ SENSE + 1F 20K NI-CAD BACKUP BATTERY
LOW BATTERY DISCONNECT
1E-23
39k
5
8
2 SENSE VOUT
CLM2951 1
+VIN
ERROR RESET
+VOUT = 5V
+ 1F
- + C4
3
SD
7 TAP
6
GND 39k
4
1%
100k
-
C1 +
100k
6V LEADACID BATTERY
<5.8V**
1%
1k
-
100k
C2 +
<6.0V**
1%
1k
-
100k
C3 +
<6.2V** 10k R3 1% 20k
*OPTIONAL LATCH OFF WHEN DROPOUT OCCURS. ADJUST R3 FOR C2 SWITCHING WHEN VIN IS 6.0V. **OUTPUTS GO LOW WHEN VIN DROPS BELOW DESIGNATED THRESHHOLDS.
REGULATOR WITH STATE-OF-CHARGE INDICATOR
1E-24
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
TYPICAL APPLICATIONS (continued)
+VIN
8 AUX SHUTDOWN INPUT OFF ON 3 +VIN SD ERROR 5
10K 5 DEGREE SHUTDOWN FLAG
CLM2951 1
VOUT GND 4 + TEMP SENSOR AS35 - FB 7
EXTERNAL CIRCUIT PROTECTED FROM OVER TEMPERATURE (V+ GOES OFF WHEN TEMP > 125)
OR
RELAY
8.2K
SYSTEM OVER TEMPERATURE PROTECTION CIRCUIT
1E-25
+5v 4 20mA 4.7mA OUTPUT
UNREGULATED INPUT
8 +VIN VOUT IN4001 CLM2951 0.1F FB GND 4 IN457 MIN VOLTAGE = 4V OPEN CIRCUIT DETECTOR FOR 4mA TO 20mA CURRENT LOOP 7 2 1
5
IN
VOUT
1
330K 2N5432 27K
CLM2951 3 2
VTAP FB 7
SENSE GND 4
5V OUTPUT + 4.7F LOAD 50mA TO 300mA
360K
1E-26
300mA REGULATOR WITH 0.75 DROPOUT
1E-27
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
SCHEMATIC DIAGRAM
IN
FEEDBACK
R18 20k Q15A Q15B Q24 Q25 Q9 Q3 Q4 Q5 R11 20.6 k Q2 Q20 R8 31.4k R10 150 k Q22 Q21 C2 40pF R15 100k Q23 Q7 Q8 Q16 Q17 R28 60k Q14 R17 12k Q26 OUT
R11 18 k C1 20pF
SENSE R27 182k 5V TAP
Q6 Q1 10 R1 20k R2 50k
Q42
R5 180 k Q13
R6 140 k Q12
R9 27.8k R12 110 k Q11 Q29 Q18 Q19 Q28 R13 100 k R14 350 k
Q40
Q41
R16 30k
R17 10
R30 30k
R3 50k
R4 13k R21 8
50k Q37 10k ERROR Q36 R22 150k
Q30 Q31 R24 50k
R23 60k
SHDN
Q38 R26 60k
Q34
R25 2.8 k GND 1E-28
Q39
Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

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