µA7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
www.ti.com
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
FEATURES
3-Terminal Regulators
Output Current up to 1.5 A
No External Components
Internal Thermal-Overload Protection
INPUT
INPUT
High Power-Dissipation Capability
Internal Short-Circuit Current Limiting
Output Transistor Safe-Area Compensation
KTE (PowerFLEX) PACKAGE
(TOP VIEW)
KCS (TO-220) PACKAGE
(TOP VIEW)
OUTPUT
INPUT
COMMON
•
•
•
OUTPUT
INPUT
COMMON
KTT (TO-263) PACKAGE
(TOP VIEW)
INPUT
•
•
•
•
OUTPUT
INPUT
COMMON
DESCRIPTION/ORDERING INFORMATION
This series of fixed-negative-voltage integrated-circuit voltage regulators is designed to complement Series
µA7900 in a wide range of applications. These applications include on-card regulation for elimination of noise
and distribution problems associated with single-point regulation. Each of these regulators can deliver up to
1.5 A of output current. The internal current limiting and thermal shutdown features of these regulators
essentially make them immune to overload. In addition to use as fixed-voltage regulators, these devices can be
used with external components to obtain adjustable output voltages and currents and also as the power-pass
element in precision regulators.
ORDERING INFORMATION (1)
TJ
–12 V
–8 V
0°C to 125°C
–5 V
(1)
(2)
ORDERABLE PART
NUMBER
PACKAGE (2)
VO(NOM)
TOP-SIDE
MARKING
TO-220, short shoulder – KCS
Tube of 50
UA7912CKCS
UA7912C
PowerFLEX™ – KTE
Reel of 2000
UA7908CKTER
UA7908C
TO-220, short shoulder – KCS
Tube of 50
UA7908CKCS
UA7908C
PowerFLEX – KTE
Reel of 2000
UA7905CKTER
UA7905C
TO-220, short shoulder – KCS
Tube of 50
UA7905CKCS
UA7905C
TO-263 – KTT
Reel of 500
UA7905CKTTR
UA7905C
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerFLEX, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1976–2006, Texas Instruments Incorporated
µA7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
www.ti.com
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
SCHEMATIC
12 V
5 V and 8 V
COMMON
5 kΩ
OUTPUT
6.2 V
20 kΩ
0.2 kΩ
INPUT
All component values are nominal.
Absolute Maximum Ratings (1)
over virtual junction temperature range (unless otherwise noted)
MIN
MAX
UNIT
Vl
Input voltage
–35
V
TJ
Operating virtual junction temperature
150
°C
Tstg
Storage temperature range
150
°C
(1)
–65
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Package Thermal Data (1)
(1)
(2)
PACKAGE
BOARD
θJA
θJC
θJP (2)
PowerFLEX (KTE)
High K, JESD 51-5
23°C/W
3°C/W
2.7°C/W
TO-220 (KCS)
High K, JESD 51-5
19°C/W
17°C/W
3°C/W
TO-263 (KTT)
High K, JESD 51-5
25.3°C/W
18°C/W
1.94°C/W
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
For packages with exposed thermal pads, such as QFN, PowerPAD™, or PowerFLEX, θJP is defined as the thermal resistance between
the die junction and the bottom of the exposed pad.
Recommended Operating Conditions
Vl
2
Input voltage
IO
Output current
TJ
Operating virtual junction temperature
MIN
MAX
µA7905
–7
–25
µA7908
–10.5
–25
µA7912
–14.5
–30
1.5
A
0
125
°C
Submit Documentation Feedback
UNIT
V
µA7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
www.ti.com
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
uA7905 Electrical Characteristics
at specified virtual junction temperature, VI = –10 V, IO = 500 mA (unless otherwise noted)
TEST CONDITIONS
TJ (1)
IO = 5 mA to 1 A, VI = –7 V to –20 V,
PD ≤ 15 W
PARAMETER
Output voltage (2)
Input regulation
Ripple rejection
Output regulation
µA7905C
MIN
TYP
MAX
25°C
–4.8
–5
–5.2
0°C to 125°C
–4.75
–5.25
VI = –7 V to –25 V
12.5
50
VI = –8 V to –12 V
4
15
VI = –8 V to –12 V, f = 120 Hz
0°C to 125°C
54
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
60
UNIT
V
mV
dB
15
100
5
50
mV
Temperature coefficient of output voltage
IO = 5 mA
0°C to 125°C
–0.4
mV/°C
Output noise voltage
f = 10 Hz to 100 kHz
25°C
125
µV
Dropout voltage
IO = 1 A
25°C
1.1
25°C
1.5
2
VI = –7 V to –25 V
0.15
0.5
IO = 5 mA to 1 A
0.08
0.5
Bias current
Bias current change
Peak output current
(1)
(2)
25°C
V
2.1
mA
mA
A
Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be
taken into account separately. All characteristics are measured with a 2-µF capacitor across the input and a 1-µF capacitor across the
output.
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
uA7908 Electrical Characteristics
at specified virtual junction temperature, VI = –14 V, IO = 500 mA (unless otherwise noted)
PARAMETER
Output voltage (2)
Input regulation
Ripple rejection
Output regulation
TJ (1)
TEST CONDITIONS
IO = 5 mA to 1 A,
VI = –10.5 V to –23 V, PD ≤ 15 W
µA7908C
MIN
TYP
MAX
25°C
–7.7
–8
–8.3
0°C to 125°C
–7.6
VI = –10.5 V to –25 V
VI = –11 V to –17 V
VI = –11.5 V to –21.5 V, f = 120 Hz
0°C to 125°C
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
54
–8.4
12.5
160
4
80
60
UNIT
V
mV
dB
15
160
5
80
mV
Temperature coefficient of output voltage
IO = 5 mA
0°C to 125°C
–0.6
mV/°C
Output noise voltage
f = 10 Hz to 100 kHz
25°C
200
µV
Dropout voltage
IO = 1 A
25°C
1.1
25°C
1.5
Bias current
Bias current change
VI = –10.5 V to –25 V
0.15
1
IO = 5 mA to 1 A
0.08
0.5
Peak output current
(1)
(2)
V
2
25°C
2.1
mA
mA
A
Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be
taken into account separately. All characteristics are measured with a 2-µF capacitor across the input and a 1-µF capacitor across the
output.
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Submit Documentation Feedback
3
µA7900 SERIES
NEGATIVE-VOLTAGE REGULATORS
www.ti.com
SLVS058H – JUNE 1976 – REVISED NOVEMBER 2006
uA7912 Electrical Characteristics
at specified virtual junction temperature, VI = –19 V, IO = 500 mA (unless otherwise noted)
PARAMETER
Output voltage (2)
Input regulation
Ripple rejection
Output regulation
TJ (1)
TEST CONDITIONS
IO = 5 mA to 1 A,
VI = –14.5 V to –27 V, PD ≤ 15 W
TYP
MAX
25°C
–11.5
–12
–12.5
0°C to 125°C
–11.4
–12.6
VI = –14.5 V to –25 V
5
80
VI = –16 V to –22 V
3
30
VI = –15 V to –25 V, f = 120 Hz
0°C to 125°C
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
54
60
UNIT
V
mV
dB
15
200
5
75
mV
Temperature coefficient of output voltage
IO = 5 mA
0°C to 125°C
–0.8
mV/°C
Output noise voltage
f = 10 Hz to 100 kHz
25°C
300
µV
Dropout voltage
IO = 1 A
25°C
1.1
25°C
2
3
VI = –14.5 V to –25 V
0.04
0.5
IO = 5 mA to 1 A
0.06
0.5
Bias current
Bias current change
Peak output current
(1)
(2)
4
µA7912C
MIN
25°C
2.1
V
mA
mA
A
Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be
taken into account separately. All characteristics are measured with a 2-µF capacitor across the input and a 1-µF capacitor across the
output.
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Submit Documentation Feedback
PACKAGE OPTION ADDENDUM
www.ti.com
13-Aug-2021
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
UA7905CKCS
ACTIVE
TO-220
KCS
3
50
RoHS & Green
SN
N / A for Pkg Type
0 to 125
UA7905C
UA7905CKCSE3
ACTIVE
TO-220
KCS
3
50
RoHS & Green
SN
N / A for Pkg Type
0 to 125
UA7905C
UA7905CKTTR
ACTIVE
DDPAK/
TO-263
KTT
3
500
RoHS & Green
SN
Level-3-245C-168 HR
0 to 125
UA7905C
UA7908CKCS
ACTIVE
TO-220
KCS
3
50
RoHS & Green
SN
N / A for Pkg Type
0 to 125
UA7908C
UA7908CKCSE3
ACTIVE
TO-220
KCS
3
50
RoHS & Green
SN
N / A for Pkg Type
0 to 125
UA7908C
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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