Datasheet CLM2951CS-5, CLM2951CS-3.3, CLM2951CS-3, CLM2951CP-5, CLM2951CP-3.3 Datasheet (Calogic LLC)

150mA Low Dropout

Voltage Regulators

CLM2950 / CLM2951

FEATURES

••

5V, 3.3V, and 3.0V Vers io ns at 150mA Output

••

Ver y Low Q ui e s cent Current

••

Low Dropout Voltage

••

Extremely Tig h t Load and Line Regul ati on

••

Ver y Low Tempe ratur e Coef fi ci ent

••

Needs Only 1µF for Stabi lit y

••

Current and Thermal Limiting

••

Unregula ted DC Inp ut can W ith st and -20V R ev ers e
Battery an d +60V Posit i ve Transien ts

••

Similar Replace me nt for LP295 0/ LP295 1 Socke ts

CLM2951 Versions Only

••

Error Flag Warns of Output Dropout

••

Logic-Controlled Electronic Shutdown

••

Outpu t Progr am ma bl e from 1. 24 to 2 9V

APPLICATIONS

••

Battery Pow er ed Syst em s

••

Cordless Telephones

••

Radio Control Systems

••

Portable / Palm T op / Noteboo k Comput ers

••

Portable Consumer Equipment

••

Portable I nst ru me nt atio n

••

Avionics

••

Automot i ve El ect r oni cs

••

SMPS Post-Regula tor

••

V ol tage Ref er en c e

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 contr ol 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), pos itive tr ansien t prote ction up to 6 0V
(Load dump), and the ability to su rvive an unregulated input
voltage transie nt of -20V be low gro und ( rever se batte ry ).

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
P ART PACKAGE TEMPERATURE RANG E

CLM2950ACN-X TO-92 (3-Pin) IND.
CLM2950CN-X TO-92 (3-Pin) IND.
CLM2951ACP-X Plastic DIP (8-Pin) IND.
CLM2951CP-X Plastic DIP (8-Pin) IND.
CLM2951ACS-X Plastic SOIC (8-Pin) IND.
CLM2951CS-X Plastic SOIC (8-Pin) IND.

X = 3.0V, 3.3V or 5.0V

CORPORATION

PIN CONNECTIONS

1D-47

123

1. OUTPUT

2. GROUND

3. INPUT

TO-92

BOTTOM VIEW

GROUND

1
2
3

8
7
6

4 5 ERROR

CLM2951

1D-46

8-PIN SURFACE MOUNT

5V OR 3.3V TAP

FEEDBACK

INPUT

SHUTDOWN

SENSE

OUTPUT

TOP VIEW

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

ABSOLUTE MAXIMUM RATINGS

Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited

Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260

o

C

Storage Tem per atur e Ra nge. . . . . . . . . . . . . . . -65 to +150

o

C
Operating Junct ion Te mper at ure Ra nge

CLM2951 . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150

o

C
CLM2950AC/CLM2950C

CLM2951AC/CLM 29 51C. . . . . . . . . . . . . . . . -40 to +125

o

C

Input Supply Vo ltag e . . . . . . . . . . . . . . . . . . . . . . . -20 to +60 V

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

CLM2950 / CLM2951

CORPORATION

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

ELECTRICAL CHARACTERISTICS: V

S

= 15V, TA = 25oC, unless otherwise specified .

PARAMETER

CLM2951

CLM2950AC
CLM2951AC

CLM2950C
CLM2951C

UNITS

CONDITIONS

(Note 2)

MIN TYP MAX MIN TYP MAX MIN TYP MAX

3V VERSIONS

Output Voltage

2.985

2.964

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

T

J

= 25oC

-25

o

C ≤ TJ ≤ 85oC

Full Operating Temperature

Output Voltage 2.955 3.0 3.045 2.958 3.0 3.042 2.928 3.0 3.072 V 100µA ≤ I

L

≤ 150mA,TJ ≤T

JMAX

3.3V VERSIONS

Output Voltage

3.284

3.260

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

T

J

= 25oC

-25

o

C ≤ TJ ≤ 85oC

Full Operating Temperature

Output Voltage 3.251 3.3 3.350 3.254 3.3 3.346 3.221 3.3 3.379 V 100µA ≤ I

L

≤ 150mA, TJ ≤T

JMAX

5V VERSIONS

Output Voltage

4.975

4.94

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

T

J

= 25oC

-25

o

C ≤ TJ ≤ 85oC

Full Operating Temperature

Output Voltage 4.925 5.0 5.075 4.93 5.0 5.07 4.88 5.0 5.12 V 100µA ≤ I

L

≤ 150mA, TJ ≤ T

JMAX

ALL VOLTAGE OPTIONS

Output Voltage
T emperature Coefficient

20 120 20 50 ppm/

o

C (Note 1)

Line Regulation (Note 3) 0.03 0.1 0.03 0.1 0.04 0.2 % 6V ≤ V

IN

≤ 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

I

L

= 100µA

I

L

= 100m A

I

L

= 150m A

Ground Current

150

3
5

170

6
8

150

3
5

170

6
8

150

3
5

170

6
8

µA
mA
mA

I

L

= 100µA

I

L

= 100m A

I

L

= 150m A

Current Limit 130 200 130 200 130 200 mA V

OUT

= 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

µVrms
µVrms
µVrms

C

L

= 1µF

C

L

= 200µF

C

L

= 13.3µF

(Bypass = 0.01µF pins 7 to 1 (CLM2951))

8-PIN VERSIONS ONLY CLM2951 CLM2951AC CLM2951C

Reference Voltage 1.22 1.235 1.25 1.22 1.235 1.25 1.21 1.23 1.26 V
Reference Voltage 1.19 1.27 1.19 1.27 1.18 1.28 V Over Temperature (Note 6)
Feedback Pin Bias Current 40 60 40 60 40 60 nA
Reference Voltage

T emperature Coefficient

20 20 50 ppm/

o

C (Note 7)

Feedback Pin Bias Current
T emperature Coefficient

0.1 0.1 0.1 nA/

o

C

CLM2950 / CLM2951

CORPORATION

BLOCK DIAGRAM

ERROR DETECTION
COMPARATOR

1D-48

1µF

REFERENCE

1.23V

UNREGULATED DC

ERROR
AMPLIFIER

60mV

+

+

TO CMOS OR
TTL

330kΩ

FROM
CMOS

OR TTL

+

+

5V @ 150mA
MAX

60kΩ

CLM2950 AND CLM2951 BLOCK DIAGRAM

180kΩ

817

SENSE

6

2

4

5

5V TAP

ERROR

GROUND

INPUT OUTPUTFEEDBACK

SHUTDOWN

3

–

+
–

+

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

ELECTRICAL CHARACTERISTIC S (continued)

PARAMETER

CLM2951

CLM2950AC
CLM2951AC

CLM2950C
CLM2951C

UNITS

CONDITIONS

(Note 2)

MIN TYP MAX MIN TYP MAX MIN TYP MAX

ERROR COMPARATOR

Output Leakage Current 0.01 1 0.01 1 0.01 1 µAV

oh

= 30V

Output Low Voltage 150 250 150 250 150 250 mV V

IN

= 4.5V, IOL = 400µA
Upper Threshold Voltage 40 60 40 60 40 60 mV (Note 8)
Lower Threshold Voltage 75 95 75 95 75 95 mV (Note 8)
Hysteresis 15 15 15 mV (Note 8)

SHUTDOWN INPUT

Inp ut Logic Voltage

2

1.3 0.6
2

1.3 0.7
2

1.3 0.7 V
V

Low (Regulato r ON)
High (Regulator OFF)

Shutdown Pin
Input Current

30

67550800

30

67550800

30

67550800

µAµAV

S

= 2.4V

V

S

= 30V

Regulator Output Current
In Shutdown

310 310 310µA (Note 9)

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 T

J

= 25oC, VIN = 6V, IL = 100µA and CL = 1µF. Additional conditions for the 8-pin

versions are feedback tied to 5V tap and output tied to output Sense (V

OUT

= 5V) and V

SHUTDOWN

≤ 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 150

o

C for IL = 1mA. For IL = 100µA and TJ = 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: V

REF

≤ V

OUT

≤ (VIN - 1V), 2.3 ≤ VIN ≤ 30V, 100µA ≤ IL ≤ 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 thre sh old s in term s of outp ut vo lta ge chan ge , mu ltip l y by the erro r amp lifier 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. Thresho lds remain constant as a percent of V

OUT

as V

OUT

is varied, with the dropout warning occurring at typically 5% below

nominal, 7.5% guaranteed.
Note 9: V

SHUTDOWN

≥ 2V, VIN ≤ 30V, V

OUT

= 0, Feedback pin tied to 5V Tap.

Note 10: All typical values are not guaranteed.

APPLICATION HINTS
EXTERNAL CAPACITORS

• The s tability o f 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 -25

o

C a solid tantalum is recommended since the

many aluminum types have electrolytes that freeze at about

-30

o

C. The ESR of about 5Ω or less and resonant
frequency about 500kHz are the most imp orta nt param eter s
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 condit io n

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.

• I f 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 ca n be fixed by ad ding
a 100pF capacitor between output and feedback and
increasing the out put capacit or to at least 3.3µF.

ERROR DETECTION COMP A RATOR 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 whi ch V

OUT

= 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 . 4.75 V) does not vary wit h 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 resist or is not require d.

PROGRAMMING THE OUTPUT VOLTAGE OF CLM2951

The CLM2951 may be pin-strapped for 5V using its internal
voltage divider by tying Pin 1 (outp ut) to Pin 2 (sense) and Pin
7 (feedback) to Pin 6 (5V Tap). Also, i t 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 requir ed.

Refer to the below equation for the programm ing of the out put
voltage:

V

OUT

= V

REF

× (1 + R1\R2) + IFBR

1

The V

REF

is 1.235 and IFB is the feedback bias current,
nominally -20nA. The minimum recomme nded load current of
1µA forces an upper limit of 1.2MΩ on value of R

2

. If no load

is presented the I

FB

produces an error of typically 2% in V

OUT

which may be eliminate d at room te mperature by trim m ing R1.
To improve the accuracy choose the value of R2 = 100k this
reduces the error by 0.17% and increases the resistor
program curr en t b y 12 µA. Since the CLM29 51 t ypica lly dra ws
60µA at no l oad 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 R

1

, since it reduces the high frequency gain from 4 to

unity.
C

BYPASS

≅ 1/2πR1 × 200Hz

or choose 0.01µF. When doing this, the output capacit or 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
improveme nt s are mor e dram at ic at hig her voltages .

CLM2950 / CLM2951

CORPORATION

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

CLM2950 / CLM2951

CORPORATION

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

TEMPERATURE (˚C)

1.8

0.6

1.2

–75 150

1D-49

SHUTDOWN

THRESHOLD VOLTAGE

SHUTDOWN THRESHOLD VOLTAGE (V)

0.8

1.0

1.4

1.6

–50 –25 0 25 50 75 100 125

INPUT VOLTAGE (V)

180

0

030

1E-01

RATED

OUTPUT CURRENT

OUTPUT CURRENT (mA)

510 252015

20

40

60

80

100

120

140

160

TA= 50˚C

T

A

= 85˚C

T

A

= 25˚C

V

OUT

= 5V

8-PIN SOIC
SOLDERED
TO PC BOARD

T

JMAX

= 125˚C

INPUT VOLTAGE (V)

30

–10

1D-50

LINE REGULATION

OUTPUT VOLTAGE CHANGE (mV)

0

0

10

10

20

–5

5

5

15

25

30252015105

TJ= 150˚C

T

J

= 125˚C

I

L

= 100µA

I

L

= 1mA

IL= 100µA

TYPICAL PERFORMANCE CHARACTERI STIC S

TIME (mS)

125

100µA

10

1E-02

LOAD TRANSIENT

RESPONSE

LOAD CURRENT

25

100mA

75

OUTPUT VOLTAGE

CHANGE (mV)

86420

100

50

0
–25
–50

CL= 4.7µF
V

OUT

= 5V

TIME (µs)

1E-04

ENABLE TRANSIENT

SHUTDOWN

PIN VOLTAGE (V)

OUTPUT

VOLTAGE (V)

–100 7000 100 200 300 400 500 600

7

–2

0

2

0

1

2

3

4

5

6

CL= 1.5µF

V

OUT

= 5VCL= 10µF

V

IN

= 8V

I

L

= 10mA

TIME (mS)

80

100µA

20

1E-03

LOAD TRANSIENT

RESPONSE

LOAD CURRENT

0

100mA

40

OUTPUT VOLTAGE

CHANGE (mV)

1612840

60

20

–20
–40
–60

CL= 15µF
V

OUT

= 5V

INPUT VOLTAGE (V)

1E-05

ERROR

COMPARATOR OUTPUT

COMPARATOR OUTPUT (V)

0612 543

8

–2

6

4

2

0

V

OUT

= 5V

NOTE: PULLUP RESISTOR
TO SEPARATE 5V SUPPLY

HYSTERESIS

400mV

4V

800

1E-07

LINE TRANSIENT

RESPONSE

INPUT

VOLTAGE

0 200 400 600

0

8V

6V

200mV

–50mV

OUTPUT VOLTAGE

CHANGE

= 5V

CL= 4.7µF
I

L

= 1mA

V

OUT

2.5

0.0

0.0 0.9

1E-06

COMPARATOR

SINK CURRENT

SINK CURRENT (mA)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

2.0

1.5

1.0

0.5

TA= 125˚C

T

A

= 25˚C

T

A

= –55˚C

CLM2950 / CLM2951

CORPORATION

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

2.2

1.6
150

1E-08

MINIMUM

OPERATING VOLTAGE

–50 0 50 100

2.0

1.8

1.7

2.1

1.9

MINIMUM OPERATING VOLTAGE (V)

TEMPERATURE (˚C)

–25 25 75 125–75

INPUT VOLTAGE (V)

160

0

08

1E-10

GROUND PIN CURRENT

QUIESCENT CURRENT (µA)

1 2 3 4 5 6 7

20

40

60

100

120

140

80

IL= 1mA

I

L

= 0

TEMPERATURE (˚C)

5.06

4.94

5.0

–75 150

1E-09

OUTPUT VOLTAGE vs

TEMPERATURE OF 3

REPRESENTATIVE UNITS

OUTPUT VOLTAGE (V)

4.96

4.98

5.02

5.04

–50 –25 0 25 50 75 100 125

0.2%

FREQUENCY (Hz)

1E-11

OUTPUT IMPEDANCE

OUTPUT IMPEDANCE (OHMS)

10

0.01
10 1M

100 1K 100K10K

0.1

1

0.02

0.05

0.2

0.5

2

5

CL= 4.7µF

IO= 100µA

I

O

= 1mA IO= 100mA

V

OUT

= 5V

FREQUENCY (Hz)

90

20

1E-13

RIPPLE REJECTION

RIPPLE REJECTION (dB)

80

70

60

50

40

30

10

6

10

5

10

4

10

3

10

2

10

1

IL= 1mA

C

L

= 1.5µF

V

IN

= 6V

I

L

= 10mA

V

OUT

= 5V

FREQUENCY (Hz)

90

20

1E-12

RIPPLE REJECTION

RIPPLE REJECTION (dB)

80

70

60

50

40

30

10

6

10

5

10

4

10

3

10

2

10

1

CL= 1.5µF

I

L

= 0

IL= 100µA

V

OUT

= 5V

V

IN

= 6V

FREQUENCY (Hz)

80

10

1E-14

RIPPLE REJECTION

RIPPLE REJECTION (dB)

70

60

50

40

30

20

10

6

10

5

10

4

10

3

10

2

10

1

CL= 1.5µF
V

IN

= 6V

V

OUT

= 5V

I

L

= 50µA

I

L

= 100mA

TEMPERATURE (˚C)

–75 150

1E-16

DIVIDER RESISTANCE

PIN 2 TO PIN 4 RESISTANCE (kΩ)

–50 –25 0 25 50 75 100 125

400

0

100

300

200

FREQUENCY (Hz)

3.5

0.0

1E-15

OUTPUT NOISE

VOLTAGE NOISE

SPECTRAL DENSITY (µV/ Hz)

3.0

2.5

2.0

1.5

1.0

0.5

10

5

10

2

10

4

10

3

IL= 100mA

C

L

= 4.7µF

C

L

= 3.3µF

0.01mF
BYPASS
PIN 1 TO
PIN 7

CL= 220µF

TYPICAL PERFORMANCE CHARACTERI STICS ( cont inue d)

CLM2950 / CLM2951

CORPORATION

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

INPUT VOLTAGE (V)

150

0

030

1E-17

RAISED OUTPUT

OUTPUT CURRENT (mA)

510 252015

20

40

60

80

100

120

140

160

TO-92 PACKAGE

.25˚ LEADS SOLDERED

TO PC BOARD

TA= 85˚C

T

A

= 25˚C

T

JMAX

= 125˚C

180

TIME (µS)

5

–1

050

1E-18

THERMAL RESPONSE

4

2

0

–2

1

0

30 402010

POWER

DISSIPATION (W)

OUTPUT VOLTAGE

CHANGE (mV)

1.25W

TYPICAL PERFORMANCE CHARACTERI STICS ( cont inue d)

1E-19

*SEE APPLICATION INFO.

OUTPUT
VOLTAGE

INPUT
VOLTAGE

4.75V

ERROR*

1.3V

5.0V

R

1

+V

IN

CLM2951

FB

4

1E-20

SD

GND

V

OUT

7

ERROR

8

1

3

R

2

ERROR
OUTPUT

SHUTDOWN
INPUT

3.3µF

+

+V

IN

1.2 TO 30V

1.23V

.01µF

100K

5

V

REF

TYPICAL APPLICA TION S

R

1

+V

IN

CLM2951

FB

4

1E-21

SD

GND

V

OUT

7

ERROR

8

1

+V

IN

1µF

+

3

V

OUT

470KΩ

470KΩ

R

2

LATCH OFF WHEN ERROR FLAG OCCURS

5

*V

OUT

= V

IN

+V

IN

CLM2951

FB

4

1E-22

SD

GND

V

OUT

7

ERROR
OUTPUT

SHUTDOWN
INPUT

ERROR

8

1

+V

IN

*MINIMUM INPUT - OUTPUT VOLTAGE RANGES FROM 4mV TO 400mV.

DEPENDING ON LOAD CURRENT. CURRENT LIMIT IS TYPICALLY 160mA.

WIDE INPUT VOLTAGE RANGE CURRENT LIMITER

5

3

FIGURE 1. ERROR OUTPUT TIMING FIGURE 2. ADJUST A BL E REGULAT OR

CLM2950 / CLM2951

CORPORATION

CLM2951

4

1E-23

GND

8

1

3

SENSE

MAIN V-

MEMORY V+

NI-CAD
BACKUP
BATTERY

CLM385

6V
SEALED
LEAD­ACID
BATTERY
SOURCE

100KΩ

1.5KΩ120KΩ

400KΩ

20KΩ

FB

IN457

SD

V

OUT

+V

IN

FOR 5.5V

LOW BATTERY DISCONNECT

+

1µF

+

+V

IN

CLM2951

TAP

4

1E-24

SD

GND

V

OUT

6

ERROR

8

1

1µF

+

3

+V

OUT

39k

Ω

100k

Ω

100k

Ω

100k

Ω

–
+

C4

2

SENSE

= 5V

7

39k

Ω

100k

Ω

1k

Ω

1k

Ω

10k

Ω

20k

Ω

<6.2V**

<6.0V**

<5.8V**

1%

1%

1%

1%

5

R

3

6V
LEAD­ACID
BATTERY

REGULATOR WITH STATE-OF-CHARGE INDICATOR

RESET

–
+

C1

–

+

C2

–

+

C3

*OPTIONAL LATCH OFF WHEN DROPOUT OCCURS. ADJUST R3 FOR C2 SWITCHING WHEN V IS 6.0V.

**OUTPUTS GO LOW WHEN V DROPS BELOW DESIGNATED THRESHHOLDS.

IN

IN

TYPICAL APPLICA TION S (continue d)

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

+V

IN

CLM2951

FB

4

1E-25

GND

8

5

SYSTEM OVER TEMPERATURE PROTECTION CIRCUIT

AUX SHUTDOWN
INPUT

+V

IN

AS35

5 DEGREE SHUTDOWN FLAG

V

OUT

1

EXTERNAL CIRCUIT
PROTECTED FROM

OVER TEMPERATURE

(V+ GOES OFF WHEN

TEMP > 125)

OR

TEMP

SENSOR

7

+

–

3

ERROR

SD

10KΩ

ON

OFF

RELAY

8.2KΩ

TYPICAL APPLICA TION S (continue d)

CLM2951

4

1E-26

GND

8

1

OPEN CIRCUIT DETECTOR FOR 4mA TO 20mA CURRENT LOOP

7

FB 2

4 20mA

IN4001

360KΩ

0.1µF

IN457

OUTPUT

4.7mA

+5v

MIN VOLTAGE = 4V

+V

IN

V

OUT

CLM2951

4.7µF
LOAD 50mA
TO 300mA

OUTPUT

5V

1

2

SENSE

GND

5

UNREGULATED INPUT

3

300mA REGULATOR WITH 0.75 DROPOUT

74

2N5432

27KΩ

330KΩ

IN

1E-27

V

TAP

FB

V

OUT

+

CLM2950 / CLM2951

CORPORATION

ERROR

GND

SHDN

5V TAP

SENSE

OUT

FEEDBACKIN

R25

2.8
k

Ω

R23 60k

Ω

R21 8

Ω

R24
50k

Ω

R16
30k

Ω

R15
100k

Ω

R17
10

Ω

R13

100

k

Ω

R14
350
k

Ω

R22
150k

Ω

R17

12k

Ω

R28
60k

Ω

R27
182k

Ω

R18
20k

Ω

R26
60k

Ω

50k

Ω

10k

Ω

R3

50k

Ω

R4

13k

Ω

R30

30k

Ω

R5

180

k

Ω

R6

140

k

Ω

R9

27.8k

Ω

R2

50k

Ω

R1

20k

Ω

R8

31.4k

Ω

R10

150

k

Ω

R12

110

k

Ω

R11
18
k

Ω

R11

20.6
k

Ω

Q1

Q30 Q31

Q19Q18

Q29

Q28

Q22

Q21

Q20

Q34

Q40

Q41

Q42

Q13 Q12

Q3 Q4

Q7

Q8

Q9

Q6

Q15A Q15B

Q16 Q17

Q14

Q25

Q24

Q23

Q11

Q38

Q37 Q36

Q39

Q26

Q2

Q5

C1

20pF

C2
40pF

1E-28

10

SCHEMAT IC DIAGRAM

CLM2950 / CLM2951

CORPORATION

Information furnished by Calogic is believed to be accurate and reliable. Howe ver, no responsibility is assum ed for its use: nor f or any infring eme nt of pate nts 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: [phone], FAX: [phone]