MOTOROLA MC7924CP Datasheet
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
THREE–TERMINAL
NEGATIVE FIXED
VOLTAGE REGULATORS
Pin 1. Ground
2. Input
3. Output
STANDARD APPLICATION
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.
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.
MC79XX
Input
Cin*
0.33
µ
F
CO**
1.0
µ
F
Output
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
3
1
2
3
1
2
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
XX,
**
**
Order this document by MC7900/D
1
MOTOROLA ANALOG IC DEVICE DATA
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
Gnd
V
O
V
I
2.4 k
25
3.6 k
1.2 k
1.1 k
2.0 k
12 k
1.0 k
4.0 k
2.0 k
14.7 k
2.0 k
8.0 k
1.0 k
1.6 k
4.0 k
0.3
10 k
10 k
20 k 20 k
20 pF
10 pF
240
750
R
1
R
2
This device contains 26 active transistors.
ORDERING INFORMATION
Device
Output Voltage
Tolerance
Operating
Temperature Range
Package
MC79XXACD2T 2%
MC79XXCD2T 4%
°
°
Surface Mount
MC79XXACT 2%
T
J
= 0° to +
125°C
MC79XXCT 4%
I
nsertion Moun
t
MC79XXBD2T
–
°
°
Surface Mount
MC79XXBT
4%
T
J
= –
40° to +125°C
Insertion Mount
XX indicates nominal voltage.
Motorola, Inc. 1996 Rev 6
MC7900
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS (T
A
= +25°C, unless otherwise noted.)
Rating Symbol Value Unit
Input Voltage (–5.0 V ≥ VO ≥ –18 V)
Input Voltage (24 V)
V
I
–35
–40
Vdc
Power Dissipation
Case 221A
TA = +25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
65 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Case 936 (D2PAK)
TA = +25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
70 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Storage Junction Temperature Range T
stg
–65 to +150 °C
Junction Temperature T
J
+150 °C
THERMAL CHARACTERISTICS
Characteristics Symbol Max Unit
Thermal Resistance, Junction–to–Ambient R
θJA
65 °C/W
Thermal Resistance, Junction–to–Case R
θJC
5.0 °C/W
MC7905C
ELECTRICAL CHARACTERISTICS (V
I
= –10 V , IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) V
O
–4.8 –5.0 –5.2 Vdc
Line Regulation (Note 1)
(TJ = +25°C, IO = 100 mA)
–7.0 Vdc ≥ VI ≥ –25 Vdc
–8.0 Vdc ≥ VI ≥ –12 Vdc
(TJ = +25°C, IO = 500 mA)
–7.0 Vdc ≥ VI ≥ –25 Vdc
–8.0 Vdc ≥ VI ≥ –12 Vdc
Reg
line
–
–
–
–
7.0
2.0
35
8.0
50
25
100
50
mV
Load Regulation, TJ = +25°C (Note 1)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Reg
load
–
–
11
4.0
100
50
mV
Output Voltage
–7.0 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W
V
O
–4.75 – –5.25
Vdc
Input Bias Current (TJ = +25°C) I
IB
– 4.3 8.0 mA
Input Bias Current Change
–7.0 Vdc ≥ VI ≥ –25 Vdc
5.0 mA ≤ IO ≤ 1.5 A
∆I
IB
–
–
–
–
1.3
0.5
mA
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
– 40 – µV
Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 70 – dB
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–V
O
– 2.0 –
Vdc
Average Temperature Coef ficient of Output Voltage
IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C
∆VO/∆T
– –1.0 –
mV/°C
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.
MC7900
3
MOTOROLA ANALOG IC DEVICE DATA
MC7905AC
ELECTRICAL CHARACTERISTICS (V
I
= –10 V , IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) V
O
–4.9 –5.0 –5.1 Vdc
Line Regulation (Note 1)
–8.0 Vdc ≥ VI ≥ –12 Vdc; IO = 1.0 A, TJ = +25°C
–8.0 Vdc ≥ VI ≥ –12 Vdc; IO = 1.0 A
–7.5 Vdc ≥ VI ≥ –25 Vdc; IO = 500 mA
–7.0 Vdc ≥ VI ≥ –20 Vdc; IO = 1.0 A, TJ = +25°C
Reg
line
–
–
–
–
2.0
7.0
7.0
6.0
25
50
50
50
mV
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
Reg
load
–
–
–
11
4.0
9.0
100
50
100
mV
Output Voltage
–7.5 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W
V
O
–4.80 – –5.20
Vdc
Input Bias Current I
IB
– 4.4 8.0 mA
Input Bias Current Change
–7.5 Vdc ≥ VI ≥ –25 Vdc
5.0 mA ≤ IO ≤ 1.0 A
5.0 mA ≤ IO ≤ 1.5 A, TJ = +25°C
∆I
IB
–
–
–
–
–
–
1.3
0.5
0.5
mA
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
– 40 – µV
Ripple Rejection (IO = mA, f = 120 Hz) RR – 70 – dB
Dropout Voltage
IO = 1.0 A. TJ = +25°C
VI–V
O
– 2.0 –
Vdc
Average Temperature Coef ficient of Output Voltage
IO = 5.0 A, 0°C ≤ TJ ≤ +125°C
∆VO/∆T
– –1.0 –
mV/°C
MC7905.2C
ELECTRICAL CHARACTERISTICS
(VI = –10 V , IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) V
O
–5.0 –5.2 –5.4 Vdc
Line Regulation (Note 1)
(TJ = +25°C, IO = 100 mA)
–7.2 Vdc ≥ VI ≥ –25 Vdc
–8.0 Vdc ≥ VI ≥ –12 Vdc
(TJ = +25°C, IO = 500 mA)
–7.2 Vdc ≥ VI ≥ –25 Vdc
–8.0 Vdc ≥ VI ≥ –12 Vdc
Reg
line
–
–
–
–
8.0
2.2
37
8.5
52
27
105
52
mV
Load Regulation, TJ = +25°C (Note 1)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Reg
load
–
–
12
4.5
105
52
mV
Output Voltage
–7.2 Vdc ≥ VI ≥ –20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W
V
O
–4.95 – –5.45
Vdc
Input Bias Current (TJ = +25°C) I
IB
– 4.3 8.0 mA
Input Bias Current Change
–7.2 Vdc ≥ VI ≥ –25 Vdc
5.0 mA ≤ IO ≤ 1.5 A
∆I
IB
–
–
–
–
1.3
0.5
mA
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
– 42 – µV
Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 68 – dB
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–V
O
– 2.0 –
Vdc
Average Temperature Coef ficient of Output Voltage
IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C
∆VO/∆T
– –1.0 –
mV/°C
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.
MC7900
4
MOTOROLA ANALOG IC DEVICE DATA
MC7906C
ELECTRICAL CHARACTERISTICS
(VI = –11 V, IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) V
O
–5.75 –6.0 –6.25 Vdc
Line Regulation (Note 1)
(TJ = +25°C, IO = 100 mA)
–8.0 Vdc ≥ VI ≥ –25 Vdc
–9.0 Vdc ≥ VI ≥ –13 Vdc
(TJ = +25°C, IO = 500 mA)
–8.0 Vdc ≥ VI ≥ –25 Vdc
–9.0 Vdc ≥ VI ≥ –13 Vdc
Reg
line
–
–
–
–
9.0
3.0
43
10
60
30
120
60
mV
Load Regulation, TJ = +25°C (Note 1)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Reg
load
–
–
13
5.0
120
60
mV
Output Voltage
–8.0 Vdc ≥ VI ≥ –21 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W
V
O
–5.7 – –6.3
Vdc
Input Bias Current (TJ = +25°C) I
IB
– 4.3 8.0 mA
Input Bias Current Change
–8.0 Vdc ≥ VI ≥ –25 Vdc
5.0 mA ≤ IO ≤ 1.5 A
∆I
IB
–
–
–
–
1.3
0.5
mA
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
– 45 – µV
Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 65 – dB
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–V
O
– 2.0 –
Vdc
Average Temperature Coef ficient of Output Voltage
IO = 5.0 A, 0°C ≤ TJ ≤ +125°C
∆VO/∆T
– –1.0 –
mV/°C
MC7908C
ELECTRICAL CHARACTERISTICS (V
I
= –14 V , IO = 500 mA, 0°C < TJ < +125°C, unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (TJ = +25°C) V
O
–7.7 –8.0 –8.3 Vdc
Line Regulation (Note 1)
(TJ = +25°C, IO = 100 mA)
–10.5 Vdc ≥ VI ≥ –25 Vdc
–11 Vdc ≥ VI ≥ –17 Vdc
(TJ = +25°C, IO = 500 mA)
–10.5 Vdc ≥ VI ≥ –25 Vdc
–11 Vdc ≥ VI ≥ –17 Vdc
Reg
line
–
–
–
–
12
5.0
50
22
80
40
160
80
mV
Load Regulation, TJ = +25°C (Note 1)
5.0 mA ≤ IO ≤ 1.5 A
250 mA ≤ IO ≤ 750 mA
Reg
load
–
–
26
9.0
160
80
mV
Output Voltage
–10.5 Vdc ≥ VI ≥ –23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, P ≤ 15 W
V
O
–7.6 – –8.4
Vdc
Input Bias Current (TJ = +25°C) I
IB
– 4.3 8.0 mA
Input Bias Current Change
–10.5 Vdc ≥ VI ≥ –25 Vdc
5.0 mA ≤ IO ≤ 1.5 A
∆I
IB
–
–
–
–
1.0
0.5
mA
Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) V
n
– 52 – µV
Ripple Rejection (IO = 20 mA, f = 120 Hz) RR – 62 – dB
Dropout Voltage
IO = 1.0 A, TJ = +25°C
VI–V
O
– 2.0 –
Vdc
Average Temperature Coef ficient of Output Voltage
IO = 5.0 mA, 0°C ≤ TJ ≤ +125°C
∆VO/∆T
– –1.0 –
mV/°C
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.
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