CALOGIC CLM2950CN-X 150ma low dropout voltage regulator Datasheet

150mA Low Dropout
Voltage Regulators
CORPORATION
CLM2950 / CLM2951
FEATURES
• 5V, 3.3V, and 3.0V Versions at 150mA Output
• Very Low Quiescent Current
Dropout Voltage
• Low
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
Only 1µF for Stability
• Needs
• 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
•
•
•
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.
APPLICATIONS
• Battery Powered Systems
• Cordless Telephones
Control Systems
• Radio
• Portable / Palm Top / Notebook Computers
• Portable Consumer Equipment
Instrumentation
• Portable
• Avionics
• Automotive Electronics
Post-Regulator
• SMPS
• Voltage Reference
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
PACKAGE
TEMPERATURE RANGE
CLM2950ACN-X
CLM2950CN-X
CLM2951ACP-X
CLM2951CP-X
CLM2951ACS-X
CLM2951CS-X
TO-92 (3-Pin)
TO-92 (3-Pin)
Plastic DIP (8-Pin)
Plastic DIP (8-Pin)
Plastic SOIC (8-Pin)
Plastic SOIC (8-Pin)
IND.
IND.
IND.
IND.
IND.
IND.
X = 3.0V, 3.3V or 5.0V
PIN CONNECTIONS
8-PIN SURFACE MOUNT
TO-92
OUTPUT
1
8
INPUT
SENSE
2
7
FEEDBACK
SHUTDOWN
3
6
5V OR 3.3V TAP
GROUND
4
5
ERROR
1
2
3
CLM2951
BOTTOM VIEW
TOP VIEW
1. OUTPUT
2. GROUND
3. INPUT
1D-47
1D-46
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.
CLM2950AC
CLM2951AC
CLM2951
PARAMETER
CLM2950C
CLM2951C
CONDITIONS
(Note 2)
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
2.985
3.0
3.015
3.036
2.985
2.970
2.964
3.0
3.0
3.0
3.015
3.030
3.036
2.970
2.955
2.940
3.0
3.0
3.0
3.030
3.045
3.060
V
V
V
TJ = 25oC
-25oC ≤ TJ ≤ 85oC
Full Operating Temperature
2.955
3.0
3.045
2.958
3.0
3.042
2.928
3.0
3.072
V
100µA ≤ IL ≤ 150mA,TJ ≤TJMAX
3.284
3.3
3.317
3.340
3.284
3.267
3.260
3.3
3.3
3.3
3.317
3.333
3.340
3.267
3.251
3.234
3.3
3.3
3.3
3.333
3.350
3.366
V
V
V
TJ = 25oC
-25oC ≤ TJ ≤ 85oC
Full Operating Temperature
3.251
3.3
3.350
3.254
3.3
3.346
3.221
3.3
3.379
V
100µA ≤ IL ≤ 150mA, TJ ≤TJMAX
4.975
5.0
5.025
5.06
4.975
4.95
4.94
5.0
5.0
5.0
5.025
5.050
5.06
4.95
4.925
4.90
5.0
5.0
5.0
5.05
5.075
5.10
V
V
V
TJ = 25oC
-25oC ≤ TJ ≤ 85oC
Full Operating Temperature
5.0
5.075
4.93
5.0
5.07
4.88
5.0
5.12
V
100µA ≤ IL ≤ 150mA, TJ ≤ TJMAX
Output Voltage
Temperature Coefficient
20
120
20
3V VERSIONS
Output Voltage
2.964
Output Voltage
3.3V VERSIONS
Output Voltage
3.260
Output Voltage
5V VERSIONS
Output Voltage
4.94
Output Voltage
4.925
ALL VOLTAGE OPTIONS
ppm/oC
50
(Note 1)
Line Regulation (Note 3)
0.03
0.1
0.03
0.1
0.04
0.2
%
6V ≤ VIN ≤ 30V (Note 4)
Load Regulation (Note 3)
0.04
0.1
0.04
0.1
0.1
0.2
%
100µA ≤ IL ≤ 150mA
Dropout Voltage
(Note 5)
50
380
450
80
450
500
50
380
450
80
450
500
50
380
450
80
450
500
mV
mV
mV
IL = 100µA
IL = 100mA
IL = 150mA
Ground Current
150
3
5
170
6
8
150
3
5
170
6
8
150
3
5
170
6
8
µA
mA
mA
IL = 100µA
IL = 100mA
IL = 150mA
Current Limit
130
200
130
200
130
200
mA
VOUT = 0
Thermal Regulation
0.05
0.2
0.05
0.2
0.05
0.2
%/W
Output Noise,
10Hz to 100KHz
430
160
100
430
160
100
0430
160
100
CLM2951
CLM2951AC
CLM2951C
8-PIN VERSIONS ONLY
Reference Voltage
1.22
Reference Voltage
1.19
1.235
1.25
1.22
1.27
1.19
60
1.235
40
1.25
1.21
1.27
1.18
60
1.23
40
µVrms
µVrms
µVrms
1.26
CL = 1µF
CL = 200µF
CL = 13.3µF
(Bypass = 0.01µF pins 7 to 1 (CLM2951))
V
1.28
V
60
nA
Feedback Pin Bias Current
40
Reference Voltage
Temperature Coefficient
20
20
50
ppm/oC
Feedback Pin Bias Current
Temperature Coefficient
0.1
0.1
0.1
nA/oC
Over Temperature (Note 6)
(Note 7)
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
ELECTRICAL CHARACTERISTICS (continued)
CLM2951
PARAMETER
ERROR COMPARATOR
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
SHUTDOWN INPUT
MIN
TYP
MAX
1
250
40
0.01
150
60
75
15
1.3
0.6
Input Logic Voltage
CLM2950C
CLM2951C
MIN
TYP MAX
UNITS
0.01
150
60
75
15
1
250
0.01
150
60
75
15
1
250
µA
mV
mV
mV
mV
Voh = 30V
VIN = 4.5V, IOL = 400µA
(Note 8)
(Note 8)
(Note 8)
1.3
0.7
1.3
0.7
Low (Regulator ON)
High (Regulator OFF)
VS = 2.4V
VS = 30V
(Note 9)
40
95
40
95
95
30
675
50
800
30
675
50
800
30
675
50
800
V
V
µA
µA
3
10
3
10
3
10
µA
2
Shutdown Pin
Input Current
Regulator Output Current
In Shutdown
CLM2950AC
CLM2951AC
MIN
TYP
MAX
2
2
CONDITIONS
(Note 2)
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 = 100µA and CL = 1µF. 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 = 100µA 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, 100µA ≤ 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
+
8
FEEDBACK
5V @ 150mA
MAX
1
INPUT
OUTPUT
2
SENSE
+
–
3
FROM
CMOS
OR TTL
ERROR
AMPLIFIER
180k Ω
6
60kΩ
+
5
+
1µF
+
60mV
–
+
330k Ω
5V TAP
SHUTDOWN
1.23V
ERROR DETECTION
COMPARATOR
ERROR
4
TO CMOS OR
TTL
REFERENCE
GROUND
CLM2950 AND CLM2951 BLOCK DIAGRAM
1D-48
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 1.0µF 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 5Ω 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.
• 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 0.5µF and 0.15µF 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 5µF 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 1µA 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 1µA tantalum or aluminum electrolytic capacitor
should be placed from the input to the ground.
• Instability
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 3.3µF.
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.
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 400µA, this
value adds to battery drain in a low battery condition.
Suggested values range from 100K to 1MΩ. 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 × (1 + R1\R2) + IFBR1
The VREF is 1.235 and IFB is the feedback bias current,
nominally -20nA. The minimum recommended load current of
1µA forces an upper limit of 1.2MΩ 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 12µA. Since the CLM2951 typically draws
60µA 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 1µF to 220µF only
decreases the noise from 430µV to 160µVrms 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 ≅ 1/2πR1 × 200Hz
or choose 0.01µF. When doing this, the output capacitor must
be increased to 3.3µF to maintain stability. These changes
reduce the output noise from 430µV to 100µVrms 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.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
SHUTDOWN
THRESHOLD VOLTAGE
1.4
1.2
0.6
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (˚C)
1D-49
LOAD TRANSIENT
RESPONSE
LOAD TRANSIENT
RESPONSE
80
75
50
25
0
–25
–50
CL = 4.7µF
VOUT = 5V
100mA
100µA
0
2
4
6
TIME (mS)
8
10
40
20
0
–20
100µA
0
SINK CURRENT (mA)
6
4
HYSTERESIS
2
0
CL = 15µF
VOUT = 5V
VOUT = 5V
2.0
1.5
4
8
12
TIME (mS)
16
20
–2
0
1
2
3
4
5
INPUT VOLTAGE (V)
COMPARATOR
SINK CURRENT
1E-05
TA = 25˚C
60
TA = 50˚C
40
TA = 85˚C
5
10
15
20
25
INPUT VOLTAGE (V)
TA = 125˚C
30
1E-01
ENABLE TRANSIENT
CL = 1.5µF
6
5
4
3
IL = 10mA
VIN = 8V
1
VOUT = 5V
CL = 10µF
0
2
0
–2
–100 0
100 200 300 400 500 600 700
TIME (µs)
1E-04
LINE TRANSIENT
RESPONSE
400mV
200mV
TA = 25˚C
0
CL = 4.7µF
–50mV
1.0
TA = –55˚C
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
6
80
1E-03
0.5
NOTE: PULLUP RESISTOR
TO SEPARATE 5V SUPPLY
VOUT = 5V
100
2
100mA
2.5
TJMAX = 125˚C
120
0
–40
–60
ERROR
COMPARATOR OUTPUT
8
140
7
60
1E-02
8-PIN SOIC
SOLDERED
TO PC BOARD
0
OUTPUT
VOLTAGE (V)
100
160
20
OUTPUT VOLTAGE
CHANGE
0.8
OUTPUT VOLTAGE
CHANGE (mV)
OUTPUT VOLTAGE
CHANGE (mV)
LOAD CURRENT
IL = 1mA
10
IL = 100µA
5 TJ = 125˚C
0
–5
–10
25
30
5
10
15
20
INPUT VOLTAGE (V)
1D-50
125
COMPARATOR OUTPUT (V)
IL = 100µA
INPUT
VOLTAGE
1.0
RATED
OUTPUT CURRENT
180
OUTPUT CURRENT (mA)
1.6
30
25
20
15
10 TJ = 150˚C
5
0
SHUTDOWN
PIN VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (mV)
1.8
LINE REGULATION
LOAD CURRENT
SHUTDOWN THRESHOLD VOLTAGE (V)
TYPICAL PERFORMANCE CHARACTERISTICS
1E-06
IL = 1mA
VOUT = 5V
8V
6V
4V
0
200
400
600
800
1E-07
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2950 / CLM2951
CORPORATION
2.2
OUTPUT VOLTAGE (V)
2.0
1.9
1.8
5.04
5.02
5.0
4.98
0.2%
4.96
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
5
IO = 100µA
2
IO = 1mA
1
IO = 100mA
0.5
0.2
VOUT = 5V
0.1
CL = 4.7µF
0.05
50
IL = 100µA
CL = 1.5µF
100
1K
10K
100K
FREQUENCY (Hz)
20
101
1M
IL = 50µA
60 IL = 100mA
50
40
30
CL = 1.5µF
20 VIN = 6V
106
1E-14
104
105
CL = 4.7µF
CL = 220µF
CL = 3.3µF
1.5
1.0
0.01mF
0.5 BYPASS
PIN 1 TO
PIN 7
0.0
102
1
2
3
4
5
6
INPUT VOLTAGE (V)
7
8
1E-10
RIPPLE REJECTION
CL = 1.5µF
VIN = 6V
80
VOUT = 5V
70
IL = 1mA
60
50
40
400
IL = 100mA
2.0
20
1E-12
3.0
2.5
40
20
101
106
OUTPUT NOISE
3.5
60
IL = 10mA
103
FREQUENCY (Hz)
RIPPLE REJECTION
VOUT = 5V
10
101
10 2
103
104
105
FREQUENCY (Hz)
10 2
1E-11
IL = 0
80
30
VOUT = 5V
PIN 2 TO PIN 4 RESISTANCE (kΩ)
0.01
10
70
IL = 0
30 VIN = 6V
0.02
80
70
40
IL = 1mA
100
90
80
60
120
0
RIPPLE REJECTION
90
140
0
RIPPLE REJECTION (dB)
OUTPUT IMPEDANCE
GROUND PIN CURRENT
160
1.7
RIPPLE REJECTION (dB)
OUTPUT IMPEDANCE (OHMS)
5.06
2.1
10
RIPPLE REJECTION (dB)
OUTPUT VOLTAGE vs
TEMPERATURE OF 3
REPRESENTATIVE UNITS
QUIESCENT CURRENT (µA)
MINIMUM
OPERATING VOLTAGE
VOLTAGE NOISE
SPECTRAL DENSITY (µV/ Hz)
MINIMUM OPERATING VOLTAGE (V)
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
103
104
FREQUENCY (Hz)
105
1E-15
10 2
103
104
105
FREQUENCY (Hz)
106
1E-13
DIVIDER RESISTANCE
300
200
100
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)
RAISED OUTPUT
180
OUTPUT VOLTAGE
CHANGE (mV)
140
TJMAX = 125˚C
120
100
80
60
TA = 25˚C
40
TA = 85˚C
20
0
5
0
10
15
20
25
INPUT VOLTAGE (V)
4
2
0
–2
POWER
DISSIPATION (W)
OUTPUT CURRENT (mA)
160
THERMAL RESPONSE
5
TO-92 PACKAGE
.25˚ LEADS SOLDERED
TO PC BOARD 150
30
1
1.25W
0
–1
0
10
20
30
TIME (µS)
1E-17
50
40
1E-18
TYPICAL APPLICATIONS
+VIN
4.75V
OUTPUT
VOLTAGE
8
100K
5
ERROR
OUTPUT
ERROR*
+VIN
ERROR
VOUT
1.2 TO 30V
1
CLM2951
+
3
SHUTDOWN
INPUT
.01µF
GND
5.0V
INPUT
VOLTAGE
3.3µF
R1
SD
FB
4
7
1.23V
1.3V
R2
V REF
*SEE APPLICATION INFO.
1E-19
1E-20
FIGURE 1. ERROR OUTPUT TIMING
FIGURE 2. ADJUSTABLE REGULATOR
+VIN
+VIN
8
470K Ω
5
470K Ω
8
+VIN
VOUT
ERROR
VOUT
1
5
ERROR
OUTPUT
+VIN
VOUT
ERROR
CLM2951
1
*VOUT = VIN
CLM2951
+
3
R1
SD
GND
4
1µF
FB
SHUTDOWN
INPUT
3
SD
GND
7
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 Ω
1.5KΩ
8
+VIN
IN457
FB
VOUT
CLM385
1
MAIN V-
CLM2951
400K Ω
MEMORY V+
SENSE
FOR 5.5V
3
100K Ω
+
1µF
SD
NI-CAD
BACKUP
BATTERY
4
LOW BATTERY DISCONNECT
1E-23
8
39kΩ
+VIN
5
2
SENSE
ERROR
VOUT
RESET
1
–
3
C4
1µF
100kΩ
7
SD
GND
TAP
4
6
39kΩ
1%
+VOUT = 5V
+
CLM2951
+
20K Ω
GND
–
100kΩ
C1
+
6V
LEADACID
BATTERY
<5.8V**
1%
1kΩ
–
100kΩ
C2
+
<6.0V**
1%
1kΩ
–
100kΩ
C3
+
<6.2V**
10kΩ
R3
1%
20kΩ
*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
3
AUX SHUTDOWN
INPUT
OFF
10K Ω
+VIN
ERROR
SD
ON
5
5 DEGREE SHUTDOWN FLAG
CLM2951
VOUT
GND
FB
4
7
1
EXTERNAL CIRCUIT
PROTECTED FROM
OVER TEMPERATURE
(V+ GOES OFF WHEN
TEMP > 125)
+
TEMP
SENSOR
AS35
OR
RELAY
8.2KΩ
–
SYSTEM OVER TEMPERATURE PROTECTION CIRCUIT
1E-25
+5v
4
UNREGULATED INPUT
4.7mA
20mA
OUTPUT
8
5
+VIN
VOUT
1
VOUT
IN
1
CLM2951
0.1µF
FB
7
3
2
VTAP
SENSE
FB
GND
4
IN457
7
360K Ω
2N5432
27K Ω
IN4001
CLM2951
330K Ω
GND
4
2
5V
OUTPUT
+
4.7µF
LOAD 50mA
TO 300mA
MIN VOLTAGE = 4V
OPEN CIRCUIT DETECTOR FOR 4mA TO 20mA CURRENT LOOP
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 Ω
Q15A
Q15B
Q24
Q25
Q26
OUT
Q9
Q3
Q6
Q7
Q4
R11
18
kΩ
SENSE
Q5
Q8
Q14
R11
20.6
kΩ
C1
20pF
Q16
R27
182k Ω
R17
12k Ω
Q17
5V TAP
R28
60k Ω
Q1
Q2
10
Q20
R1
20k Ω
Q42
R2
50k Ω
Q40
R5
180
kΩ
Q21
Q23
C2
40pF
R15
100k Ω
R9
27.8k Ω
R6
140
kΩ
Q13
Q41
Q22
R10
150
kΩ
R8
31.4k Ω
R12
110
kΩ
Q12
R13
100
kΩ
R14
350
kΩ
R16
30k Ω
Q11
Q29
Q18
R30
30k Ω
R17
10 Ω
Q19
Q28
R3
50k Ω
R4
13k Ω
R21 8 Ω
50k Ω
Q30 Q31
Q37
10k Ω
R22
150k Ω
Q36
R23 60k Ω
SHDN
R24
50k Ω
ERROR
Q34
Q38
R26
60k Ω
R25
2.8
kΩ
GND
Q39
1E-28
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