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MC33761 Datasheet

Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control

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MC33761
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Ultra Low-Noise Low
Dropout Voltage Regulator
with 1V ON/OFF Control
The MC33761 is an Low DropOut (LDO) regulator featuring
excellent noise performances. Thanks to its innovative concept, the
circuit reaches an incredible 40µVRMS noise level without an
external bypass capacitor. Housed in a small SOT–23 5 leads–like
package, it represents the ideal designer’s choice when space and
noise are at premium.
The absence of external bandgap capacitor unleashes the response
time to a wake–up signal and makes it stay within 40µs (in repetitive
mode), pushing the MC33761 as a natural candidate in portable
applications.
The MC33761 also hosts a novel architecture which prevents
excessive undershoots when the regulator is the seat of fast transient
bursts, as in any bursting systems.
Finally, with a static line regulation better than –75dB, it naturally
shields the downstream electronics against choppy lines.
Features
Ultra low–noise: 150nV/Hz @ 100Hz, 40µVRMS 100Hz – 100kHz
typical, Iout = 60mA, Co=1µF
Fast response time from OFF to ON: 40µs typical at a 200Hz
repetition rate
Ready for 1V platforms: ON with a 900mVhigh level
Nominal output current of 80mA with a 100mA peak capability
Typical dropout of 90mV @ 30mA, 160mV @ 80mA
Ripple rejection: 70dB @ 1kHz
1.5% output precision @ 25°C
Thermal shutdown
Vout available from 2.5V to 5.0V
Applications
Noise sensitive circuits: VCOs RF stages etc.
Bursting systems (TDMA phones)
All battery operated devices
ON/
OFF 3
On/Off
NC
4
Band Gap
Reference
Thermal
Shutdown
1 Vin
http://onsemi.com
5
1
TSOP–5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
Vin 1
GND 2
ON/OFF 3
5 Vout
4 NC
xx = Version
YW = Date Code
(Top View)
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
2
GND
5 Vout
Simplified Block Diagram
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 1999
November, 1999 – Rev. 0
1
Publication Order Number:
MC33761/D


  ON Semiconductor Electronic Components Datasheet  

MC33761 Datasheet

Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control

No Preview Available !

MC33761
PIN FUNCTION DESCRIPTIONS
Pin #
Pin Name
Function
1 Vin
2 GND
Powers the IC
The IC’s ground
3 ON/OFF
Shuts or
wakes–up the IC
4 NC
None
5 Vout
Delivers the
output voltage
Description
A positive voltage up to 12V can be applied upon this pin.
A 900mV level on this pin is sufficient to start the IC. A 150mV shuts it down.
It makes no arm to connect the pin to a known potential, like in a pin–to–pin
replacement case.
This pin requires a 1µF output capacitor to be stable.
MAXIMUM RATINGS
Rating
Power Supply Voltage
ESD Capability, HBM Model
ESD Capability, Machine Model
Maximum Power Dissipation
NW Suffix, Plastic Package
Thermal Resistance Junction–to–Air
Operating Ambient Temperature
Maximum Junction Temperature (1)
Maximum Operating Junction Temperature (2)
Storage Temperature Range
(1) Internally Limited by Shutdown.
(2) Specifications are guaranteed below this value.
Pin #
1
All Pins
All Pins
Symbol
Vin
PD
RqJ–A
TA
TJmax
TJ
Tstg
Value
Min Max
— 12
1
200
Internally
Limited
210
–40 to +85
150
125
–60 to +150
ELECTRICAL CHARACTERISTICS
(For Typical Values TA = 25°C, for Min/Max values TA = –40°C to +85°C, Max TJ = 125°C unless otherwise noted)
Characteristics
Pin #
Symbol
Min
Typ
Logic Control Specifications
Input Voltage Range
3 VON/OFF 0
ON/OFF Input Resistance (all versions)
ON/OFF Control Voltages (3)
Logic Zero, OFF State, IO = 50 mA
Logic One, ON State, IO = 50 mA
3 RON/OFF
3 VON/OFF
900
250
Currents Parameters
Current Consumption in OFF State (all versions)
OFF Mode Current: Vin = Vout + 1 V, IO = 0, VOFF = 150 mV
IQOFF
0.1
Current Consumption in ON State (all versions)
ON Mode Current: Vin = Vout + 1 V, IO = 0, VON = 3.5 V
IQON
180
Current Consumption in ON State (all versions), ON Mode
Saturation Current: Vin = Vout – 0.5 V, No Output Load
IQSAT
800
Current Limit Vin = Voutnom + 1 V,
Output is brought to Voutnom – 0.3 V (all versions)
m(3) Voltage Slope should be Greater than 2 mV/ s
IMAX
100
180
Max
Vin
150
2
Unit
V
kV
V
W
°C/W
°C
°C
°C
°C
Unit
V
kW
mV
mA
mA
mA
mA
http://onsemi.com
2


Part Number MC33761
Description Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control
Maker ON Semiconductor
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MC33761 Datasheet PDF






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