VREG5_2

Low Drop 5V-Regulator

 

Functional Description

VREG5_2 is a highly efficient supply voltage regulator for 5V circuits. It is designed to provide power supply for embedded logic cores as well as external circuits. Fast startup and fast settling on load transients make this cell exceptionally suited for mixed signal ASICs. The high efficiency (load current to quiescent current ratio) is useful for low power applications.

The regulator contains a comparator for use as a reset control in digital systems and/or power-down control in analog systems. During the startup time of the regulator the output RESN will stay low until V5V reaches a level of about 4V. Above this threshold RESN goes to high and will remain in this state until V5V goes below a threshold of about 3V.

The cell requires a single high supply and generates a 5V supply for on-chip and external subsystems. Input and output voltage are referenced to the negative supply VSSA. Capacitive blocking is recommended to provide current paths for high frequency transients and to prevent oscillations.

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Key Features

  • POWER Supply: VDDH = 6.5...30V
    40V for 20 000s
  • Regulated Output Voltage 5.0V
  • Low Drop through p-channel Pass Transistor
  • High Efficiency
  • Maximum Load Current 10mA
  • Internal Overcurrent Limiting Circuitry
  • Low Quiescent Current 50µA
  • Internal Bandgap Reference source
  • Temperature Proportional Voltage Output for Thermal Overload Protection
  • Static Generation of Reset-signal


    • Height: 900 µm
    Width: 330 µm
    Area: 300 000 µm²

Pin List

PinDescriptionCapacitance
V5V Output Voltage -
VTEMP Temperature Output Voltage -
VBG Reference Output Voltage -
RESN Inverted Reset Output -
IB2u Bias Sink Output -
IB1u1 Bias Sink Output -
IB1u2 Bias Sink Output -
VDDH Power Supply -
VSSA Analog Ground -

Electrical Parameters

Parameter Symbol Min Typ Max Unit
Static Parameters 
Power Supply Range VDDH 6.5   40 V
Temperature Range  Temp  -40 25 85 °C
Reference Voltage
VBG
  
1.26
  
V
Temperature Voltage @300K
VTEMP
  
.9
  
V
Temperature Coefficient of VTEMP
TKt
  
3200
  
ppm/K
Bias Output Current  IB1µX   1   µA 
Bias Output Current
IB2µ
  
2
  
µA
Quiescent Supply Current  IDD    55    µA 
Capacitive Load  CL 0   50 µF
Output Voltage  V5V 4.5 5.0  5.5 V
Temperature Coefficient of V5V TKo -100  10 100 ppm/K
Output Current  IOUT 0    10  mA
Load Regulation Resistance
ROUT
    
3
Ohm
Threshold voltage High
(rising slope) Signal RES
 VthH
  
 4.0
  
V
Threshold voltage Low
(falling slope) Signal RES
VthL
  
3.0
  
V
AC Parameters 
Power supply rejection ratio PSSR       dB
Transient Parameters 
Startup Time @ IOUT=5mA  Tsup   5   µsec

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