Automotive low dropout linear voltage regulator with configurable output voltage
having 200 mA current capability
Features
Product status link
L99VR01
Max. supply voltage (load
dump)
Max. output voltage tolerance
Output current
Quiescent current
1. Maximum value with regulator disabled
ΔV
V
S
O
I
O
I
qn
40 V
+/-2%
200 mA
≤1 µA
(1)
•AEC-Q100 qualified
•Operating DC power supply voltage range from 2.15 V to 28 V
•Battery and post regulation operating modes are allowed
•Low dropout voltage
•Low quiescent current consumption
•User-selectable output voltage (0.8 V; 1.2 V; 1.5 V; 1.8 V; 2.5 V; 2.8 V; 3.3 V or
5 V)
•Output voltage precision ±2%
•Enable input for enabling/disabling the voltage regulator
•Output voltage monitoring with reset output
•Negligible ESR effect on output voltage stability for load capacitor
•Programmable autonomous watchdog through external capacitor (L99VR01J
only)
•Undervoltage lockout UVLO
•Fast output discharge
•Thermal shutdown and short-circuit current limitation
•Advanced thermal warning and output overvoltage diagnostic (L99VR01J only)
•Programmable short-circuit output current (L99VR01J only)
•Wide operating temperature range (TJ = -40°C to 175°C L99VR01J only)
•Documentation available for customers that need support when dealing with
ASIL requirements as per ISO 26262
DS13649 - Rev 2 - April 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
L99VR01
Description
L99VR01 is a low dropout linear voltage regulator designed for automotive
applications available in SO-8 and in PowerSSO-12 packages. The LDO delivers
up to 200 mA of load current and consumes as low as 1 μA of quiescent current
when the regulator is disabled. The input is 40 V tolerant to withstand load dump,
while the operating input voltage range is between 2.15 V and 28 V. The L99VR01
can be configured, through SELx pins, to generate a fixed selectable output voltage
(0.8 V; 1.2 V; 1.5 V; 1.8 V; 2.5 V; 2.8 V; 3.3 V or 5 V). High output voltage
accuracy (±2%) is kept over wide temperature range, line and load variation. The
L99VR01 features enable, reset, autonomous watchdog, advanced thermal warning,
fast output discharge and IShort control (IShort control, autonomous watchdog and
advanced thermal warning are available only for the L99VR01J). The regulator output
current is internally limited so that the device is protected against short-circuit and
overload, besides it features over temperature protection; the short current value
is configurable by an external resistance in the L99VR01J version. The L99VR01
can operate both in post regulation, attached to a pre-regulated voltage or directly
connected to battery.
DS13649 - Rev 2
page 2/47
1Block diagram and pins description
Figure 1. Functional block diagram of L99VR01S
L99VR01
Block diagram and pins description
DS13649 - Rev 2
page 3/47
Block diagram and pins description
Figure 2. Functional block diagram of L99VR01J
L99VR01
Table 1. Pins description
Pin nameSO-8 pin
V
S
11
SEL122
SEL233
SEL344
TW5
I
Short
EN57
GND68Ground reference.
V
CW
PowerSSO-12
pin
6
9
Supply voltage.
Block directly to ground with ceramic capacitor ≥ 4.7 µF and a 100 nF
capacitator as close as possible to the pin
Output voltage selectors.
Advanced thermal warning output.
If the device detects a junction temperature above the warning
threshold, the pin is pulled low. If an overvoltage condition occurs, a
square wave is provided through the TW output. Leave floating if not
used.
Programmable short circuit output current input pin. A resistor between
Ishort pin and GND sets the short circuit output current value.
Enable input.
With the Enable high, regulator, watchdog and reset are operating.
With the Enable low, regulator, watchdog and reset are shutdown,
while the fast discharge circuit is turned on.
Connect the Enable to Vs to keep the device always enabled
Watchdog timer adjust.
A capacitor between VCW pin and GND sets the time response of the
watchdog monitor (just for L99VR01J).
Function
DS13649 - Rev 2
page 4/47
SO-8
PowerSSO-12
L99VR01
Block diagram and pins description
Pin nameSO-8 pin
Wi10
RST711
V
O
TABTABConnected to ground
812
PowerSSO-12
pin
Watchdog refresh input.
If the square wave frequency at this input pin is too low, a low pulse at
RST pin is generated (just for L99VR01J).
Reset output.
It is pulled down when output voltage goes below Vo_th or frequency at
Wi is too low (just for L99VR01J). Leave floating if not used.
Voltage regulator output.
Block to ground with a capacitor ≥ 3.3 µF (needed for regulator
stability).
Figure 3. Pins configuration
Function
DS13649 - Rev 2
page 5/47
2Electrical specifications
2.1Absolute maximum ratings
Stressing the device above the rating listed in the Table 2. Absolute maximum ratings may cause permanent
damage to the device. These are stress ratings only and operation of the device at these or any other conditions
above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
Table 2. Absolute maximum ratings
SymbolParameterValueUnit
V
S
V
S
I
S
V
O
I
O
V
Wi
V
CW
V
rst
I
rst
V
tw
I
tw
V
sh_ctrl
V
EN
V
SELx
VESD HBMESD HBM voltage level (HBM-MIL STD 883C)±2kV
VESD CDM
DC supply voltage-0.3 to 28V
Single pulse / tmax < 400 ms “transient load
dump”
Input currentinternally limited
DC output voltage-0.3 to 6.7V
DC output currentinternally limited
Watchdog input voltage
Watchdog delay voltage
Reset output voltage
Reset output currentInternally limited
Thermal warning output voltage
Thermal warning output currentInternally limited
“Short current” control voltage-0.3 to 3.6V
Enable input
Selectors input voltage
ESD CDM voltage level (CDM AEC-Q100-011)±500V
ESD CDM voltage level on corner pins (CDM
AEC-Q100-011)
40V
-0.3 to VO + 0.3
- 0.3 to VO + 0.3
-0.3 to VO + 0.3
-0.3 to VO + 0.3
-0.3 to VS + 0.3
-0.3 to VS + 0.3
±750V
L99VR01
Electrical specifications
V
V
V
V
V
V
DS13649 - Rev 2
page 6/47
2.2Thermal data
2.2.1Thermal resistance
L99VR01
Thermal data
Table 3. Operation junction temperature
ItemSymbolParameter
Value
PowerSSO-12SO-8
A.001
A.057
A.002
1. Measured on Vs
R
thj-case
R
thj-lead
R
thj-amb
Thermal resistance junction to
case
Thermal resistance junction to
(1)
lead
Thermal resistance junction to
ambient
8.5
54.5°C/W
27.471°C/W
Note:the values quoted are for PCB 77 mm x 86 mm x 1.6 mm, FR4, four layers; Cu thickness 0.070 mm (outer
layers) . Cu thickness 0.035 mm (inner layers), Thermal vias separation 1.2 mm, Thermal via diameter 0.3 mm
+/- 0.08 mm, Cu thickness on vias 0.025 mm.
2.2.2Thermal protection
Table 4. Temperature threshold
ItemSymbolParameterTest conditionMin.Typ.Max.Unit
(1)
A.003
A.004
A.005
A.006
A.007
1. Thermal protection is guaranteed by design and characterization.
T
prot_s
T
prot_j
T
prot_hyst
T
T
stg
Thermal protection temperatureL99VR01S150180°C
(1)
Thermal protection temperatureL99VR01J175200°C
Thermal protection hysteresis11°C
Operating
J
junction
temperature
Storage temperature
SO-8
T
Power-SSO-12-40175
J
T
stg
-40150
150°C
Unit
°C/W
°C
DS13649 - Rev 2
page 7/47
2.3Electrical characteristics
Values specified in this section are for VS = 2.15 V to 18 V, TJ = - 40 °C to +150 °C, unless otherwise stated.
ItemPinSymbolParameterTest conditionMin. Typ . Max. Unit
A.008
A.009
A.010
A.011
A.012
V
V
V
V
VS, V
O
O
O
O
O
V
O
I
O
I
short
I
short
∆VO / V
O
Table 5. Electrical characteristics
VS = 2.15 to 18 V
IO = 1 to 200 mA
SEL_CONF=[0;0;0]
VS = 2.15 to 18 V
IO = 1 to 200 mA
SEL_CONF=[0;0;1]
VS = 2.15 to 18 V
IO = 1 to 200 mA
SEL_CONF=[0;1;0]
VS = 2.45 to 18 V
IO = 1 to 200 mA
Output voltage
DC output current
Short-circuit
current lower
(1)
value
L99VR01J
L99VR01S
Short-circuit
current upper
value
L99VR01J
Static line regulation
Dynamic line regulation
SEL_CONF=[0;1;1]
VS = 3.15 to 18 V
IO = 1 to 200 mA
SEL_CONF=[1;0;0]
VS = 3.45 to 18 V
IO = 1 to 200 mA
SEL_CONF=[1;0;1]
VS = 3.95 to 18 V IO = 1
to 200 mA
SEL_CONF=[1;1;0]
VS = 5.65 to 18 V IO = 1
to 200 mA
SEL_CONF=[1;1;1]
VO=0.8 V; 1.2 V, 1.5 V;
1.8 V; 2.5 V; 2.8 V; 3.3 V;
5 V
VS = 4V for VO=3.3 V
VS = 5.8 V for VO=5 V
with I
to GND
VS = 4 V for VO=3.3 V
VS = 5.8 V for VO=5 V
I
short
VS = 4 V for VO=3.3 V
VS = 5.8 V for VO=5 V
with Ishort pin floating;
Ishort > I
VS is from V
V; IO = 1 mA; 100 mA;
200 mA
VO=3.3 V; VO=5 V
VS is from V
V,Tr,f=1ms; IO = 1 mA; 50
(3)
mA; 200 mA; VO= 3.3 V;
VO=5 V
pin connected
short
> I
O
O
s_low
S_low
(2)
to 18
(2)
L99VR01
Electrical characteristics
0.7840.80.816
1.1761.21.224
1.4701.51.530
1.7641.81.836
V
2.4502.52.550
2.7442.82.856
3.2343.33.366
4.955.1
200mA
3065100mA
240360480mA
1%
to 18
3%
DS13649 - Rev 2
page 8/47
L99VR01
Electrical characteristics
ItemPinSymbolParameterTest conditionMin. Typ . Max. Unit
IO = 1 mA to 100 mA
VO= 3.3 V for VS=5 V;
VO= 5 V for VS= 6 V
IO = 10 mA to 100 mA,
Tr, f=10 us VO=3.3 V for
(3) (4)
VS=5 V; VO= 5 V for VS=
6 V
IO = 150 mA
VO = 5 V
IO = 150 mA
VO = 3.3 V
1%
3%
A.013
Static load regulation
V
O
∆VO / V
O
(4)
Dynamic load regulation
A.014
A.015
A.017
A.058
A.018
A.019
A.020
A.021
VS, V
VS, V
VS, V
VS, V
VS, V
VS, V
VS, V
VS, V
IO = 150 mA
VO = 2.8 V
500mV
IO = 150 mA
VO = 2.5 V
IO = 150 mA
O
V
dp
Drop voltage
(5)
VO = 1.8 V
IO = 200 mA
VO = 5 V
IO = 200 mA
VO = 3.3 V
IO = 200 mA
VO = 2.8 V
530mV
IO = 200 mA
VO = 2.5 V
IO = 200 mA
VO = 1.8 V
VS = 13.5 V; VO = 5 V; I
O
PSRRPower supply rejection ratio
= 200 mA
O
75
(3)
dB
fr = 1 kHz
Current consumption with
O
I
qn
regulator disabled Iqn = IS –
I
O
Current consumption with
O
I
qn_LL
regulator enabled I
– I
O
qn_LL
Current consumption with
O
I
qn_O
regulator enabled
I
= Is – I
qn_O
O
Current consumption with
O
I
qn_50
regulator enabled
I
= Is – I
qn_50
O
Current consumption with
O
I
qn_100
regulator enabled
I
= Is – I
qn_100
O
Current consumption with
O
I
qn_200
regulator enabled
I
= Is – I
qn_200
O
VS = 3.5V; 13.5 V, EN =
low
VS = 3.5 V; 13.5 V, IO = 0
= I
S
µA; EN = high
VS = 3.5 V; 13.5 V, 0 < I
≤100 µA; EN = high
VS = 3.5 V; 13.5 V, IO =
50 mA
EN = high
VS = 3.5 V; 13.5 V, IO=
100 mA EN = high
VS = 3.5 V; 13.5 V, IO=
200 mA EN = high
1µA
75100µA
O
100130µA
11.3mA
1.72.0mA
3.13.5mA
DS13649 - Rev 2
page 9/47
L99VR01
Electrical characteristics
ItemPinSymbolParameterTest conditionMin. Typ . Max. Unit
VO= 0.8 V; 1.2 V; 1.5 V;
1.8 V
A.022
V
S
V
UVLO_fall
Undervoltage lockout, falling
VO = 2.5 V; 2.8 V; 3.3 V
VO = 5 V
VO = 0.8 V; 1.2 V; 1.5 V;
1.8 V
A.023
V
S
V
UVLO_ rise
Undervoltage lockout, rising
VO=2.5 V; 2.8 V; 3.3 V
VO=5 V
1. Ishort typical value of 120 mA for t= 400 µs during the power on
2. V
= 3.5 V@VO = 0.8 V, 1.2 V,1.5 V,1.8 V& 2.5 V; V
s_Low
=5 V@ VO= 2.8 V & 3.3 V, V
s_Low
3. Parameters are guaranteed by design
4. Referred to Figure 30. Maximum load variation response
5. Considering that the minimum operating input voltage is 2.15 V, the dropout voltage (Vdp) is not defined for output voltages
below 1.8 V.
Note:all parameters are guaranteed in the junction temperature range -40°C to 150°C (unless otherwise specified);
L99VR01J device is still operative and functional at higher temperatures (up to 175°C). Parameters limit
at higher junction temperature than 150°C may change respect to what is specified as per the standard
temperature range. device functionality at high junction temperature is guaranteed by characterization.
All parameters are guaranteed by design for Vo not reported in test condition.
Note:minimum input voltage values are achievable adopting an input ceramic capacitator: C5750X7R2A475M230KA
– ceramic capacitor multistrate SMD, 4.7 μF, 100 V, ±20%, X7R, C series TDK.