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L99VR01STR Folha de dados(PDF) 19 Page - STMicroelectronics

Nome de Peças L99VR01STR
Descrição Electrónicos  Automotive low dropout linear voltage regulator with configurable output voltage having 200 mA current capability
PDF  47 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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L99VR01STR Folha de dados(HTML) 19 Page - STMicroelectronics

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4.1
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 Io = 200 mA is obtained. The high-precision of the output voltage (±2%) is
obtained with a pre-trimmed reference voltage. The voltage regulator automatically adapts its own quiescent
current to the output current level. In light load conditions the quiescent current goes down to Iqn_LL = 75 µA (low
consumption mode). L99VR01 operates with reduced input voltage (post regulation) minimizing the internal power
dissipation and maximizing the output current.
4.2
Output current limitation
Output current limitation is present to protect the regulator and the application from overload condition, such as
short to ground.
Figure 33. Behavior of output current versus regulated voltage Vo
O(A)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
I
Vo_5V
Vo_3V3
Vo_2V8
Vo_2V5
Vo_1V8
Vo_1V5
Vo_1V2
Vo_0V8
Vs = 13.5V
Ta = 25 ⁰C
The Ishort current can be set in the range from 65 mA to 360 mA through an external resistor Rsh connected
between IShort pin and ground (L99VR01J version only).
L99VR01
Voltage regulator
DS13649 - Rev 3
page 19/47



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