VREG8

8V-Regulator

 

Functional Description

VREG8 is a highly efficient supply voltage regulator for 8V circuits. It is designed to provide power supply for external circuits. 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.

This cells is planed to be used in combination with the cell VREG5.

The cell requires two high voltage supplys and a 5V supply, a reference voltage and a bias current, which are provided by the cell VREG5. 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

  • HV Power Supply: VDDH = 11...30V
    40V for 20 000s
  • Regulated Output Voltage 8V
  • N-channel Pass Transistor
  • Low Quiescent Current 20µA
  • High Efficiency
  • Maximum Load Current 30mA
  • Internal Overcurrent Limiting Circuitry


    • Height: 750 µm
    Width: 140 µm
    Area: 105 000 µm²

Pin List

PinDescriptionCapacitance
V8V Output Voltage -
VBG Reference Voltage Input -
IB1 Bias Source Input -
VDDH HV Power Supply -
VDDH1 HV Power Supply -
VDDA LV Power Supply -
VSSA Analog Ground -

Electrical Parameters

Parameter Symbol Min Typ Max Unit
Static Parameters 
Power Supply Range VDDH 11   40 V
Power Supply
VDDA
4.5
5.0
5.5
V
Temperature Range  Temp  -40 25 85 °C
Reference Voltage
VBG
  
1.26
  
V
Quiescent Supply Current
IDH
  
20
  
µA 
Bias Current  IB1   1   µA 
Quiescent Supply Current  IDL   3 * IB1   µA 
Capacitive Load  CL 0   50 µF
Output Voltage  V8V   8.0    V
Output Current  IOUT 0    30 mA
Load Regulation Resistance 
ROUT
    
2
Ohm
AC Parameters 
Power supply rejection ratio PSSR       dB
Transient Parameters 
Startup Time @ IOUT=5mA  Tsup   5   µsec

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