ZLDO500T8TA Diodes Inc, ZLDO500T8TA Datasheet

Low Dropout (LDO) Regulators 5.0V Ultra Low Dropout Regulator

ZLDO500T8TA

Manufacturer Part Number
ZLDO500T8TA
Description
Low Dropout (LDO) Regulators 5.0V Ultra Low Dropout Regulator
Manufacturer
Diodes Inc
Datasheet
1.ZLDO500T8TA.pdf (9 pages)

Specifications of ZLDO500T8TA

Number Of Outputs
1
Polarity
Positive
Input Voltage Max
20 V
Output Voltage
5 V
Output Type
Fixed
Dropout Voltage (max)
0.01 V at 10 mA
Output Current
300 mA
Line Regulation
70 mV
Load Regulation
123 mV
Voltage Regulation Accuracy
2.5 %
Maximum Power Dissipation
2 W
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Package / Case
SM-8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
5.0 VOLT ULTRA LOW DROPOUT
REGULATOR
ISSUE 2 - JULY 1997
DEVICE DESCRIPTION
The ZLDO Series low dropout linear
regulators
low dropout voltage, typically only 30mV
with a load current of 100mA. The regulator
series features output voltages in the range
2.7 to 18 volts, this device provides an output
voltage of 5.0 volts.
The ZLDO500 consumes a typical quiescent
current of only 1mA at its maximum rated
output current of 300mA. A battery low flag
is available to indicate potential power fail
situations. If the input voltage falls to within
200mV of the regulated output voltage then
the error output pulls low. The device also
features an active high disable control. Once
disabled the ZLDO quiescent current falls to
typically 11 A.
The ZLDO devices are packaged in Zetex
SM8 8 pin small outline surface mount
package, ideal for applications where space
saving is important. The device low dropout
voltage, low quiescent current and small size
make it ideal for low power and battery
powered applications. Battery powered
circuits can make particular use of the low
battery flag and shutdown features.
Shutdown
Control
operate with an exceptionally
THERMAL
SHUTDOWN
SHUTDOWN
Low Battery Flag
LOW BATTERY
COMPARATOR
CIRCUIT
BIAS
4-80
Gnd
FEATURES
APPLICATIONS
Very low dropout voltage
6mV dropout at 10mA output
30mV dropout at 100mA output
100mV dropout at 300mA output
Other voltages available
1mA quiescent at 300mA output
5.0 volt fixed output
Low quiescent current
Low battery flag
Shutdown control
Surface mount package
Battery powered devices
Portable instruments
Portable communications
Laptop/Palmtop computers
Electronic organisers
BANDGAP
REFERENCE
OUTPUT
DRIVE
ZLDO500
Shaping
Vo
Vin
Cs

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ZLDO500T8TA Summary of contents

Page 1

VOLT ULTRA LOW DROPOUT REGULATOR ISSUE 2 - JULY 1997 DEVICE DESCRIPTION The ZLDO Series low dropout linear regulators operate with an exceptionally low dropout voltage, typically only 30mV with a load current of 100mA. The regulator series features ...

Page 2

ABSOLUTE MAXIMUM RATING Input Supply Voltage Range Shutdown Input Voltage Range Low Battery Output Voltage Range ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) T Parameter SYMBOL Output voltage Output voltage o temperature coefficient T Line regulation V ...

Page 3

ZLDO500 NOTES. 1. Maximum power dissipation of the device is calculated assuming the package is mounted on a PCB measuring 2 inches square. 2 Output voltage temperature coefficient is calculated as:- 3. Dropout voltage is defined as the input to ...

Page 4

TYPICAL CHARACTERISTICS 2000 (out) 1800 1600 1400 10pF 1200 4.7pF 2.2pF 1000 800 600 400 200 0 100 1K 10K Frequency (Hz) Output Impedance vs. Frequency 5.04 Io=10mA V )=7V (in 5.03 5.02 5.01 5.00 4.99 4.98 ...

Page 5

ZLDO500 TYPICAL CHARACTERISTICS 220 V(in)= 7V 200 180 160 140 120 85 ° C 100 25 ° -40 ° 0.1 1.0 10 Load Current (mA) Dropout Voltage vs. Load Current V(in)= 7V Io= ...

Page 6

Operation From A Low Voltage Battery Pack Fig.1 shows the ZLDO500 regulator being used to stabilise the output battery pack. The ultra low dropout voltage of only 100mV at full load (300mA) given by the regulator ...

Page 7

ZLDO500 APPLICATIONS voltage of the ZLDO500 allows this circuit technique to be implemented very effectively, giving a highly stable and accurate low noise supply. 3). Logic Controlled Power Supply Figure 3 shows all that is necessary to allow a microprocessor ...

Page 8

ZLDO500 devices, the parts can be damaged by sustained output shorts or excessive loads when combined with high input supply voltages. To ensure reliable operation, keep loads within the SOA graph boundaries Indicated in the typical characteristics. 5). Low Battery ...

Page 9

ZLDO500 CONNECTION DIAGRAM SM8 Package Suffix – T8 Top View – Pin 6 must be left floating SEE PIN DEFINITIONS ORDERING INFORMATION Part Number Package ZLDO500T8 SM8 Part Mark ZLDO500 4-88 ...

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