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MC7924BT Schematic ( PDF Datasheet ) - Motorola Semiconductors

Teilenummer MC7924BT
Beschreibung THREE-TERMINAL NEGATIVE FIXED VOLTAGE REGULATORS
Hersteller Motorola Semiconductors
Logo Motorola Semiconductors Logo 




Gesamt 12 Seiten
MC7924BT Datasheet, Funktion
Three-Terminal Negative
Voltage Regulators
The MC7900 series of fixed output negative voltage regulators are
intended as complements to the popular MC7800 series devices. These
negative regulators are available in the same seven–voltage options as the
MC7800 devices. In addition, one extra voltage option commonly employed
in MECL systems is also available in the negative MC7900 series.
Available in fixed output voltage options from – 5.0 V to – 24 V, these
regulators employ current limiting, thermal shutdown, and safe–area
compensation – making them remarkably rugged under most operating
conditions. With adequate heatsinking they can deliver output currents in
excess of 1.0 A.
No External Components Required
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe–Area Compensation
Available in 2% Voltage Tolerance (See Ordering Information)
Representative Schematic Diagram
2.0 k 8.0 k
Gnd
3.6 k 1.0 k 4.0 k R1
1.2 k 1.6 k
R2
Order this document by MC7900/D
MC7900
Series
THREE–TERMINAL
NEGATIVE FIXED
VOLTAGE REGULATORS
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Ground
2. Input
3. Output
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
12
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
10 k
20 pF
10 pF 10 k
2.0 k 20 k 20 k
1.1 k
240
750
This device contains 26 active transistors.
VO
0.3
VI
ORDERING INFORMATION
Device
Output Voltage
Operating
Tolerance
Temperature Range
MC79XXACD2T
2%
MC79XXCD2T
MC79XXACT
4%
2%
TJ = 0° to +125°C
MC79XXCT
4%
MC79XXBD2T
MC79XXBT
4% TJ = – 40° to +125°C
XX indicates nominal voltage.
Package
Surface Mount
Insertion Mount
Surface Mount
Insertion Mount
STANDARD APPLICATION
Input
Cin*
0.33 µF
MC79XX
Output
CO**
1.0 µF
A common ground is required between the input
and the output voltages. The input voltage must
remain typically 2.0 V above more negative even
during the high point of the input ripple voltage.
XX, These two digits of the type number
indicate nominal voltage.
** Cin is required if regulator is located an
appreciable distance from power supply filter.
** CO improve stability and transient response.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC7905
MC7905.2
MC7906
MC7908
5.0 V
5.2 V
6.0 V
8.0 V
MC7912
MC7915
MC7918
MC7924
12 V
15 V
28 V
24 V
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 6
1






MC7924BT Datasheet, Funktion
MC7900
MC7915C
ELECTRICAL CHARACTERISTICS (VI = – 23 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ
Output Voltage (TJ = +25°C)
VO –14.4 –15
Line Regulation (Note 1)
(TJ = +25°C, IO = 100 mA)
–17.5 Vdc VI – 30 Vdc
–20 Vdc VI – 26 Vdc
(TJ = +25°C, IO = 500 mA)
–17.5 Vdc VI – 30 Vdc
–20 Vdc VI – 26 Vdc
Regline
14
6.0
57
27
Load Regulation, TJ = +25°C (Note 1)
5.0 mA IO 1.5 A
250 mA IO 750 mA
Regload
68
25
Output Voltage
–17.5 Vdc VI – 30 Vdc, 5.0 mA IO 1.0 A, P 15 W
VO
–14.25
Input Bias Current (TJ = +25°C)
IIB – 4.4
Input Bias Current Change
–17.5 Vdc VI – 30 Vdc
5.0 mA IO 1.5 A
IIB
––
––
Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz)
Vn – 90
Ripple Rejection (IO = 20 mA, f = 120 Hz)
RR – 60
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–VO
– 2.0
Average Temperature Coefficient of Output Voltage
IO = 5.0 A, 0°C TJ +125°C
VO/T
– –1.0
Max
–15.6
Unit
Vdc
mV
150
75
300
150
300
150
–15.75
8.0
1.0
0.5
mV
Vdc
mA
mA
µV
dB
Vdc
mV/°C
MC7915AC
ELECTRICAL CHARACTERISTICS (VI = – 23 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C)
VO –14.7 –15 –15.3 Vdc
Line Regulation (Note 1)
– 20 Vdc VI – 26 Vdc, IO = 1.0 A, TJ = +25°C
– 20 Vdc VI – 26 Vdc, IO = 1.0 A,
–17.9 Vdc VI – 30 Vdc, IO = 500 mA
–17.5 Vdc VI – 30 Vdc, IO = 1.0 A, TJ = +25°C
Load Regulation (Note 1)
5.0 mA IO 1.5 A, TJ = +25°C
250 mA IO 750 mA
5.0 mA IO 1.0 A
Regline
Regload
mV
27 75
57 150
57 150
57 150
mV
68 150
25 75
40 150
Output Voltage
–17.9 Vdc VI – 30 Vdc, 5.0 mA IO 1.0 A, P 15 W
VO Vdc
–14.4 – –15.6
Input Bias Current
Input Bias Current Change
–17.5 Vdc VI – 30 Vdc
5.0 mA IO 1.0 A
5.0 mA IO 1.5 A, TJ = +25°C
Output Noise Voltage (TA = +25°C, 10 Hz f 100 kHz)
IIB – 4.4 8.0 mA
IIB mA
– – 0.8
– – 0.5
– – 0.5
Vn – 90 – µV
Ripple Rejection (IO = 20 mA, f = 120 Hz)
RR – 60 – dB
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–VO
Vdc
– 2.0 –
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA, 0°C TJ +125°C
VO/T
mV/°C
– –1.0 –
NOTE: 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
NOTE: 1. Pulse testing with low duty cycle is used.
6 MOTOROLA ANALOG IC DEVICE DATA

6 Page









MC7924BT pdf, datenblatt
MC7900
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
How to reach us:
USA / EUROPE / Locations Not Listed: Motorola Literature Distribution;
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454
MFAX: [email protected] – TOUCHTONE 602–244–6609
INTERNET: http://Design–NET.com
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3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
12
*MC7900/D*MOTOROLA ANALOG IC DEMVICC7E90D0/ADTA

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