A Product Line of
Diodes Incorporated
ZXRE160
0.6V ENHANCED ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The ZXRE160 is a 5-terminal adjustable shunt regulator offering
excellent temperature stability and output
handling capability. This
Pin Assignments
ZXRE160_H5 (SC70/SOT353) and
ZXRE160_ET5 (TSOT25)
Top view
device offers an enhancement to the ZXRE060 part for use in a
comparator mode applications.
NEW PRODUCT
In shunt regulator mode, the ZXRE160 simplifies the design of
isolated low voltage DC-DC regulators. With its low 0.6V FB pin, it can
control the regulation of rails as low 0.6V. This makes the part ideal
for state of the art microprocessor, DSP and PLD core voltage
POL converters.
The device open-collector output can operate from 0.2V to 18V and
regulated output voltage can be set by selection of two external
divider resistors. Separating the input from the open collector output
enables the ZXRE160 to be used to make low-cost low drop-out
regulators operating at low input voltages.
The ZXRE160 is available in two grades with initial tolerances of 0.5%
and 1% for the A and standard grades respectively. It is available in
space saving low profile 5 pin SC70/SOT353, thin TSOT25 and very
small DFN1520 packages.
OUT
3
4
ZXRE160_FT4 (X2-DFN1520-6)
Top view
PGND
6
1
IN
N/C
2
5
GND
FB
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Low reference voltage (V
FB
= 0.6V)
-40°C to +125°C temperature range
Reference voltage tolerance at +25°C
0.5% ZXRE160A
1%
ZXRE160
Exposed flag floating or
connect to GND
Applications
•
•
•
•
•
Isolated DC-DC converters
Core voltage POL
Low Voltage Low-Dropout linear regulators
Shunt regulators
Adjustable voltage reference
Typical temperature drift
<4 mV (0°C to +70°C)
<6 mV (-40°C to +85°C)
<12mV (-40°C to +125°C)
0.2V to 18V open-collector output
High power supply rejection
(>45dB at 300kHz)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
ZXRE160
Document number: DS35688 Rev. 2 - 2
1 of 15
www.diodes.com
June 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXRE160
Typical Applications Circuit
NEW PRODUCT
Pin Descriptions
Package Name
Pin Number
SC70/ SOT353,
X2-DFN1520-6
TSOT25
1
—
5
4
2
3
—
1
2
3
4
5
6
Flag
Pin Name
Function
PGND
—
OUT
FB
GND
IN
—
Power Ground: Ground return for emitter of output transistor: Connect PGND and
GND together.
No connection
Output: Connect a capacitor close to device between OUT and GND for closed loop
stability. See the
Applications Information
section.
Feedback Input. Threshold voltage 600mV nominal.
Analog Ground: Ground return for reference and amplifier: Connect GND and PGND
together.
Supply Input: Connect a 0.1μF ceramic capacitor close to the device from IN to GND.
Floating or connect to GND
ZXRE160
Document number: DS35688 Rev. 2 - 2
2 of 15
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June 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXRE160
Functional Block Diagram
NEW PRODUCT
The ZXRE160 differs from most other shunt regulators in that it
has separate input and output pins and a low voltage reference.
This enables it to regulate rails down to 600mV and makes the
part ideal for isolated power supply applications that use
opto-couplers in the feedback loop and where the open-collector
output is required to operate down to voltages as low as 200mV.
The wide input voltage range of 2V to 18V and output voltage
range of 0.2V to 18V enables the ZXRE160 to be powered from
an auxiliary rail, while controlling a master rail which is above the
auxiliary rail voltage, or below the minimum V
IN
voltage. This
allows it to operate as a low-dropout voltage regulator for
microprocessor/DSP/PLD cores.
As with other shunt regulators (and shunt references), the
ZXRE160 compares its internal amplifier FB pin to a high
accuracy internal reference; if FB is below the reference then OUT
turns off, but if FB is above the reference then OUT sinks current
– up to a maximum of 15mA.
ZXRE160
Document number: DS35688 Rev. 2 - 2
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June 2012
© Diodes Incorporated
A Product Line of
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ZXRE160
Absolute Maximum Ratings
(Voltages to GND, @T
A
= +25°C, unless otherwise specified.)
Symbol
V
IN
V
OUT
V
FB
P
GND
I
OUT
T
J
T
ST
Parameter
IN Voltage relative to GND
OUT Voltage relative to GND
FB Voltage relative to GND
PGND Voltage relative to GND
OUT Pin Current
Operating Junction Temperature
Storage Temperature
Rating
20
20
20
-0.3 to +0.3
20
-40 to 150
55 to 150
Unit
V
V
V
V
mA
°C
°C
NEW PRODUCT
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.
Operation at the absolute maximum rating for extended periods may reduce device reliability.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events.
Suitable ESD precautions should be taken when handling and transporting these devices.
Package Thermal Data
Package
SC70/SOT353
TSOT25
X2-DFN1520-6
θ
JA
400°C/W
250°C/W
TBD
P
DIS
T
A
= 25°C, T
J
= 150°C
310mW
500mW
TBD
Recommended Operating Conditions
(@T
A
= +25°C, unless otherwise specified.)
Symbol
V
IN
V
IN
V
OUT
I
OUT
T
A
Parameter
IN Voltage Range (0 to +125°C)
IN Voltage Range (-40°C to 0°C)
OUT Voltage Range
OUT Pin Current
Operating Ambient Temperature
Range
Min
2
2.2
0.2
0.3
-40
Max
18
18
18
15
+125
Units
V
mA
°C
ZXRE160
Document number: DS35688 Rev. 2 - 2
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June 2012
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXRE160
Electrical Characteristics
(@T
A
= +25°C, V
DD
= 3V, unless otherwise specified.)
T
A
= +25°C, V
IN
= 3.3V, V
OUT
= V
FB
, I
OUT
= 5mA, unless otherwise specified.) (Note 4)
Symbol
Parameter
Conditions
ZXRE160A
ZXRE160
T
A
= 0°C to +85°C
ZXRE160A
ZXRE160
ZXRE160A
T
A
= -40°C to +85°C
ZXRE160
ZXRE160A
T
A
= -40°C to +125°C
ZXRE160
Min
0.597
0.594
0.595
0.592
0.594
0.591
0.593
0.590
Typ
0.6
0.6
Max
0.603
0.606
0.605
0.608
0.606
0.609
0.607
0.610
Units
NEW PRODUCT
V
FB
Feedback voltage
V
FB
LOAD
FB
LINE
Feedback pin load
regulation
Feedback pin line
regulation
Output voltage
regulation
I
OUT
= 1 to 15mA
V
IN
= 2V to 18V
V
IN
= 2.2V to 18V
V
OUT
= 0.2V to 18V,
I
OUT
= 1mA
(Ref. Figure 1)
V
IN
= 18V
3.8
T
A
= -40 to +125°C
0.3
T
A
= -40 to +125°C
6
10
1
1.5
1
mV
mV
FB
OVR
T
A
= -40 to +125°C
-45
1.5
mV
I
FB
FB input bias current
T
A
= -40 to +125°C
V
FB
= 0.7V
-200
-50
0.35
0
50
0.7
nA
V
IN
= 2V to 18V
I
OUT
= 0.3mA
V
IN
= 2.2V to 18V
I
IN
Input current
V
IN
= 2V to 18V
I
OUT
= 10mA
V
IN
= 2.2V to 18V
V
IN
= 18V, I
OUT
= 0.3mA
V
IN
= 18V,
I
OUT(LK)
OUT leakage current
Dynamic Output
Impedance
V
OUT
= 18V,
V
FB
=0V
Z
OUT
PSRR
BW
G
Note:
mA
T
A
= -40 to +125°C
0.48
T
A
= -40 to +125°C
V
FB
= 0.7V
1
1
1.5
3
0.1
T
A
= +125°C
0.25
T
A
= -40 to +125°C
>45
600
5000
1
0.4
0.6
µA
mA
I
OUT
= 1 to 15mA
f < 1kHz
Ω
dB
kHz
mA/V
Power supply rejection F = 300kHz
ratio
V
AC
= 0.3V
PP
Amplifier Unity Gain
Frequency
Amplifier
Transconductance
Ref: Figure 2
4. Production testing of the device is performed at +25°C. Functional operation of the device and parameters specified over the operating temperature
range are guaranteed by design, characterization and process control.
ZXRE160
Document number: DS35688 Rev. 2 - 2
5 of 15
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June 2012
© Diodes Incorporated
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