L4989D, L4989MD
Automotive low power voltage regulator
Datasheet - production data
Description
The L4989M and L4989MD are monolithic
integrated 5 V voltage regulators with a low drop
voltage at currents up to 150 mA.
SO-8
The output voltage regulating element consists in
a p-channel MOS and the regulation is performed
regardless of input voltage transients up to 40 V.
The high precision of the output voltage is
obtained with a pre-trimmed reference voltage.
SO-20
The devices are protected against short circuit
and an overtemperature protection switches off
the devices in case of extremely high power
dissipation.
Features
AEC-Q100 qualified
Operating DC supply
voltage range 5.6 V to 31 V
The L4989M and L4989MD watchdogs are active
when the Enable pin is high. Features like reset
and watchdog make this devices particularly
suitable to supply microprocessor systems in
automotive applications.
Very low quiescent current with watchdog
disabled
Precision output voltage (±3%)
Low drop voltage (180 mV typ at Io = 150 mA)
Reset circuit sensing the output voltage down
to 1 V
Programmable reset delay with external
capacitor
Watchdog disable input
Programmable watchdog timer with external
capacitor
Thermal shutdown and short circuit protection
Wide temperature range (Tj = -40°C to 150°C)
Table 1. Device summary
Order codes
Package
Tube
Tape & reel
SO-8
L4989D
L4989D013TR
SO-20
L4989MD
L4989MD013TR
October 2018
This is information on a product in full production.
DS8714 Rev 3
1/19
www.st.com
Contents
L4989D, L4989MD
Contents
1
Block diagram and pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
4
5
2/19
2.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1
Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.3
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
ECOPACK® packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2
SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3
SO-20 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4
SO-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5
SO-20 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DS8714 Rev 3
L4989D, L4989MD
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Watchdog Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SO-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SO-20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DS8714 Rev 3
3/19
3
List of figures
L4989D, L4989MD
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
4/19
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pins configuration (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Behavior of output current versus regulated voltage Vo . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Watchdog timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SO-8 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SO-20 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SO-8 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SO-8 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SO-20 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SO-20 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DS8714 Rev 3
L4989D, L4989MD
1
Block diagram and pin configuration
Block diagram and pin configuration
Figure 1. Block diagram
Table 2. Pins description
Pin name
SO-8(D)
S0-20(MD)
WEn
1
1
Watchdog Enable input
If high watchdog functionality is active.
Gnd
2
4
Ground reference
Gnd
5, 6, 15, 16
Function
Ground.
Connected these pins to a heat spreader ground
Res
3
7
Reset output.
It is pulled down when output voltage goes below Vo_th or
frequency at Wi is too low.
Vcr
4
10
Reset timing adjust.
A capacitor between Vcr pin and gnd, sets the reset delay time
(trd)
Vcw
5
11
Watchdog timer adjust
A capacitor between Vcw pin and gnd, sets the time response of
the watchdog monitor.
Wi
6
14
Watchdog input.
If the frequency at this input pin is too low, the Reset output is
activated.
DS8714 Rev 3
5/19
18
Block diagram and pin configuration
L4989D, L4989MD
Table 2. Pins description (continued)
Pin name
SO-8(D)
S0-20(MD)
Function
Vo
7
17
Voltage regulator output
Block to ground with a capacitor >100 nF (needed for regulator
stability)
VS
8
20
Supply voltage
Block to ground directly at IC pin with a capacitor
2, 3, 8, 9, 12, 13,
Not connected
18, 19
N.C.
Figure 2. Pins configuration (top view)
WEn
GND
Res
Vcr
1
2
3
4
8
SO-8
7
6
5
Vs
Vo
Wi
Vcw
WEn
1
20
Vs
N.C.
N.C.
2
19
18
17
16
15
14
N.C.
3
GND
GND
GND
Res
4
N.C.
8
9
13
10
11
N.C.
Vcr
5
6
7
SO-20
12
N.C.
Vo
GND
GND
Wi
N.C.
N.C.
Vcw
GAPGCFT00666
6/19
DS8714 Rev 3
L4989D, L4989MD
Electrical specifications
2
Electrical specifications
2.1
Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol
Parameter
Value
Unit
-0.3 to 40
V
VVsdc
DC supply voltage
IVsdc
Input current
VVo
DC output voltage
-0.3 to 6
IVo
DC output current
Internally limited
VWi
Watchdog input voltage
-0.3 to VVo + 0.3
V
Vod
Open Drain output voltage
-0.3 to VVo + 0.3
V
Iod
Open Drain output current
Internally limited
Vcr
Reset delay voltage
-0.3 to VVo + 0.3
V
Vcw
Watchdog delay voltage
-0.3 to VVo + 0.3
V
Watchdog Enable input voltage
-0.3 to 40
V
Junction temperature
-40 to 150
°C
±2
kV
VWEn
Tj
VESD
Internally limited
ESD voltage level (HBM-MIL STD 883C)
Note:
Maximum ratings are absolute ratings; exceeding any one of these values may cause
permanent damage to the integrated circuit.
2.2
Thermal data
V
Table 4. Thermal data
Symbol
Rth-jamb
Parameter
Thermal resistance junction to ambient
S0-8
S0-12+4+4
Unit
130 to 180
50(1)
°C/W
1. With 6 sq. cm on board heat sink.
DS8714 Rev 3
7/19
18
Electrical specifications
2.3
L4989D, L4989MD
Electrical characteristics
VS = 5.6 V to 31 V, Tj = -40°C to +150°C unless otherwise specified.
Table 5. General
Pin
Symbol
Vo
Vo_ref
Vo
Ishort_13
Parameter
Test condition
Min.
Typ.
Max.
Unit
Output voltage
VS = 5.6 to 31 V;
Io = 1 to 150 mA
4.85
5.0
5.15
V
Short circuit current
VS = 13.5 V(1)
160
210
250
mA
(1)
170
250
290
mA
Vo
Ilim
Output current limitation
VS = 13.5 V
VS, Vo
Vline
Line regulation voltage
VS = 5.6 to 31 V;
Io = 1 to 150 mA
25
mV
Vo
Vload
Load regulation voltage
Io = 1 to 150 mA
25
mV
VS, Vo
Vdp
Drop voltage
Io = 150 mA
400
mV
VS, Vo
SVR
Ripple rejection
fr = 100 Hz
VS, Vo
Iqs_1
Current consumption with
watchdog not active
Iqs_1 = IVS-Io
VS = 13.5 V;
Io < 1 mA; WEn = low
69
115
µA
VS, Vo
Iqs_10
Current consumption with
watchdog not active
Iqs_10 = IVS-Io
VS = 13.5 V;
Io = 10 mA;
WEn = low
127
300
µA
VS, Vo
Iqs_50
Current consumption with
watchdog not active
Iqs_50 = IVS-Io
VS = 13.5 V;
Io = 50 mA;
WEn = low
498
900
µA
VS, Vo
Iqs_150
Current consumption with
watchdog not active
Iqs_150 = IVS-Io
VS = 13.5 V;
Io = 150 mA;
WEn = low
1.40
2
mA
VS, Vo
Iqn_1
Current consumption with
watchdog active
Iqn_1 = IVS-Io
VS = 13.5 V;
Io < 1 mA; WEn = high
110
170
µA
VS, Vo
Iqn_10
Current consumption with
watchdog active
Iqn_10 = IVS-Io
VS = 13.5 V;
Io = 10 mA;
WEn = high
168
350
µA
VS, Vo
Iqn_50
Current consumption with
watchdog active
Iqn_50 = IVS-Io
VS = 13.5 V;
Io = 50 mA;
WEn = high
538
1000
µA
VS, Vo
Iqn_150
Current consumption with
watchdog active
Iqn_150 = IVS-Io
VS = 13.5 V;
Io = 150 mA;
WEn = high
1.45
2
mA
190
°C
Tw
Thermal protection temperature
Tw_hy
Thermal protection temperature
hysteresis
1. See Figure 3.
8/19
DS8714 Rev 3
180
55
dB
150
10
°C
L4989D, L4989MD
Electrical specifications
Table 6. Reset
Pin
Symbol
Max.
Unit
Res
Vres_l
Reset output low voltage
Rext = 5 k to Vo;
Vo > 1 V
0.4
V
Res
IRes_lkg
Reset output high leakage
current
VRes = 5 V
1
µA
Res
RRes
Pull up internal resistance
Versus Vo
10
20
50
k
Res
Vo_th
Reset threshold voltage
VS = 5.6 to 31 V;
Io = 1 to 150 mA
6%
8%
10%
Below
Vo_ref
Vcr
Vrlth
Reset timing low threshold
VS = 13.5 V
10%
13%
16%
Vo_ref
Vcr
Vrhth
Reset timing high threshold
VS = 13.5 V
44%
47%
50%
Vo_ref
Vcr
Icr
Charge current
VS = 13.5 V
8
15
30
µA
Vcr
Idr
Discharge current
VS = 13.5 V
8
15
30
µA
Vo = Vo_th -100 mV
100
250
700
µs
VS = 13.5 V;
Ctr = 1 nF
65
115
165
ms
Res
Trr_2
Res
Trd
Parameter
Reset reaction
Test condition
time(1)
Reset delay time
Min.
Typ.
1. When Vo becomes lower than 4 V, the reset reaction time decreases down to 2 µs assuring a faster reset condition in this
particular case.
Table 7. Watchdog
Pin
Symbol
Parameter
Test condition
Wi
Vih
Input high voltage
VS = 13.5 V
Wi
Vil
Input low voltage
VS = 13.5 V
Wi
Vih
Input hysteresis
VS = 13.5 V
Wi
Rwi
Pull down resistor
VS = 13.5 V
30
100
250
K
Vcw
Vwhth
High threshold
VS = 13.5 V
44%
47%
50%
Vo_ref
Vcw
Vwlth
Low threshold
VS = 13.5 V
10%
13%
16%
Vo_ref
Vcw
Icwc
Charge current
VS = 13.5 V;
Vcw = 0.1 V
5
10
20
µA
Vcw
Icwd
Discharge current
VS = 13.5 V;
Vcw = 2.5 V
1.25
2.5
5
µA
Vcw
Twop
Watchdog period
VS = 13.5 V;
Ctw = 47 nF
20
40
80
ms
Res
twol
Watchdog output low time
VS = 13.5 V;
Ctw = 47 nF
4
8
16
ms
DS8714 Rev 3
Min.
Typ.
Max.
3.5
Unit
V
1.5
500
V
mV
9/19
18
Electrical specifications
L4989D, L4989MD
Table 8. Watchdog Enable
Pin
Symbol
WEn
VWEn_l
Enable input low voltage
WEn
VWEn_h
Enable input high voltage
WEn
VWEn_hy
Enable input hysteresis
WEn
I_leak
10/19
Parameter
Pull down current
Test condition
Min.
Typ.
Max.
Unit
1
V
3
VS = 13.5 V
DS8714 Rev 3
V
600
920
1300
mV
1
2.5
5
µA
L4989D, L4989MD
Application information
3
Application information
3.1
Voltage regulator
The voltage regulator uses a p-channel MOS transistor as a regulating element. With this
structure a very low dropout voltage at current up to 150 mA is obtained. The output voltage
is regulated up to transient input supply voltage of 40 V. No functional interruption due to
over-voltage pulses is generated.The voltage Regulator is always active and not depending
on the state of WEn input pin. A short circuit protection to GND is provided.
Figure 3. Behavior of output current versus regulated voltage Vo
Vo
Vo_ref
Ishort Ilim
3.2
Iout
Reset
The reset circuit supervises the output voltage Vo. The Vo_th reset threshold is defined with
the internal reference voltage and a resistor output divider. If the output voltage becomes
lower than Vo_th then Res goes low with a reaction time trr. The reset low signal is
guaranteed for an output voltage Vo greater than 1 V.
When the output voltage becomes higher than Vo_th then Res goes high with a delay trd.
This delay is obtained by an internal oscillator.
The oscillator period is given by:
Tosc = [(Vrhth - Vrlth) x Ctr] / Icr + [(Vrhth - Vrlth) x Ctr] / Idr
where:
Icr:
is an internally generated charge current
Idr:
is an internally generated discharge current
Vrhth, Vrlth:
are two voltages defined with the output voltage and a resistor output
divider
Ctr:
is an external capacitance.
trd is given by:
trd = 512 x Tosc
The Reset is always active and not depending on the state of WEn input pin.
DS8714 Rev 3
11/19
18
Application information
L4989D, L4989MD
Figure 4. Reset timing diagram
:L
9R
9 RXWBWK
WUU
9 FU
7 RVF
WUU
9 UKWK
9 UOWK
WUG 7 RVF
5HV
*$3*&)7
3.3
Watchdog
A connected microcontroller is monitored by the watchdog input Wi. If pulses are missing,
the Reset output pin is set to low. The pulse sequence time can be set within a wide range
with the external capacitor, Ctw. The watchdog circuit discharges the capacitor Ctw, with the
constant current Icwd. If the lower threshold Vwlth is reached, a watchdog reset is generated.
To prevent this the microcontroller must generate a positive edge during the discharge of the
capacitor before the voltage has reached the threshold Vwlth. In order to calculate the
minimum time t, during which the micro-controller must output the positive edge, the
following equation can be used:
(Vwhth - Vwlth) x Ctw = Icwd x t
Every Wi positive edge switches the current source from discharging to charging. The same
happens when the lower threshold is reached. When the voltage reaches the upper
threshold, Vwhth, the current switches from charging to discharging. The result is a
saw-tooth voltage at the watchdog timer capacitor Ctw.
Figure 5. Watchdog timing diagram
:L
WZRS
9FZ
9ZKWK
9ZOWK
9ZOWK
WZRO
5HV
("1($'5
12/19
DS8714 Rev 3
L4989D, L4989MD
Package and packing information
4
Package and packing information
4.1
ECOPACK® packages
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
4.2
SO-8 package information
Figure 6. SO-8 package dimensions
*$3*&)7
DS8714 Rev 3
13/19
18
Package and packing information
L4989D, L4989MD
Table 9. SO-8 mechanical data
Symbol
Millimeters
Min.
Typ.
A
Max.
1.75
A1
0.10
A2
1.25
b
0.28
0.48
c
0.17
0.23
D(1)
4.80
4.90
5.00
E
5.80
6.00
6.20
E1(2)
3.80
3.90
4.00
e
0.25
1.27
h
0.25
0.50
L
0.40
1.27
L1
k
1.04
0°
ccc
8°
0.10
1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs
shall not exceed 0.15 mm in total (both side).
2. Dimension “E1” does not include interlead flash or protrusions. Interlead flash or protrusions shall not
exceed 0.25 mm per side.
14/19
DS8714 Rev 3
L4989D, L4989MD
4.3
Package and packing information
SO-20 package information
Figure 7. SO-20 package dimensions
Table 10. SO-20 mechanical data
Symbol
Millimeters
Min.
Typ.
Max.
A
2.35
2.65
A1
0.10
0.30
B
0.33
0.51
C
0.23
0.32
D(1)
12.60
13.00
E
7.40
7.60
e
1.27
H
10.0
10.65
h
0.25
0.75
L
0.40
1.27
k
0°
8°
ddd
0.10
1. “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs
shall not exceed 0.15 mm per side.
DS8714 Rev 3
15/19
18
Package and packing information
4.4
L4989D, L4989MD
SO-8 packing information
Figure 8. SO-8 tube shipment (no suffix)
B
Base Q.ty
Bulk Q.ty
Tube length (± 0.5)
A
B
C (± 0.1)
C
A
100
2000
532
3.2
6
0.6
All dimensions are in mm.
Figure 9. SO-8 tape and reel shipment (suffix “TR”)
Reel dimensions
Base Q.ty
Bulk Q.ty
A (max)
B (min)
C (± 0.2)
F
G (+ 2 / -0)
N (min)
T (max)
2500
2500
330
1.5
13
20.2
12.4
60
18.4
All dimensions are in mm.
Tape dimensions
According to Electronic Industries Association
(EIA) Standard 481 rev. A, Feb. 1986
Tape width
Tape Hole Spacing
Component Spacing
Hole Diameter
Hole Diameter
Hole Position
Compartment Depth
Hole Spacing
W
P0 (± 0.1)
P
D (+0.1/-0)
D1 (min)
F (± 0.05)
K (max)
P1 (± 0.1)
12
4
8
1.5
1.5
5.5
4.5
2
All dimensions are in mm.
End
Start
Top
cover
tape
No components
Components
500mm min
Empty components pockets
saled with cover tape.
User direction of feed
16/19
DS8714 Rev 3
No components
500mm min
L4989D, L4989MD
4.5
Package and packing information
SO-20 packing information
Figure 10. SO-20 tube shipment (no suffix)
C
Base Q.ty
Bulk Q.ty
Tube length (± 0.5)
A
B
C (± 0.1)
B
40
800
532
3.5
13.8
0.6
All dimensions are in mm.
A
Figure 11. SO-20 tape and reel shipment (suffix “TR”)
Reel dimensions
Base Q.ty
Bulk Q.ty
A (max)
B (min)
C (± 0.2)
D
G (+ 2 / -0)
N (min)
T (max)
1000
1000
330
1.5
13
20.2
24.4
60
30.4
Tape dimensions
According to Electronic Industries Association
(EIA) Standard 481 rev. A, Feb. 1986
Tape width
Tape Hole Spacing
Component Spacing
Hole Diameter
Hole Diameter
Hole Position
Compartment Depth
Hole Spacing
All dimensions are in mm.
W
P0 (± 0.1)
P
D (+0.1/-0)
D1 (min)
F (± 0.05)
K (max)
P1 (± 0.1)
24
4
12
1.5
1.5
11.5
6.5
2
End
Start
Top
cover
tape
No components
Components
No components
500mm min
Empty components pockets
saled with cover tape.
500mm min
User direction of feed
DS8714 Rev 3
17/19
18
Revision history
5
L4989D, L4989MD
Revision history
Table 11. Document revision history
18/19
Date
Revision
Changes
16-Apr-2012
1
Initial release.
This document replace the L4989 datasheet.
19-Sep-2013
2
Updated Disclaimer.
01-Oct-2018
3
Updated title and added the feature “AEC-Q100 qualified” in cover
page with automotive logo.
DS8714 Rev 3
L4989D, L4989MD
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DS8714 Rev 3
19/19
19
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