Diodes ZXRE060 User Manual

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ZXRE060

0.6V ADJUSTABLE PRECISION SHUNT REGULATOR

Description

The ZXRE060 is a 5-terminal adjustable shunt regulator offering excellent temperature stability and output handling capability. The ZXRE060 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 it 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 ZXRE060 to be used to make low-cost low drop-out regulators operating at low input voltages.

The ZXRE060 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 SOT23 and very small DFN1520 packages. The ZXRE060 in TSOT23-5 has its OUT, GND and FB pins matching the Cathode, Anode and reference pins of the TL432 and TLV431 in SOT23-3, thereby facil itating simple upgrade paths.

Features

• Low reference voltage (VFB = 0.6V)

• -40 to 125ºC temperature range

• Reference voltage tolerance at 25°C

o 0.5% ZXRE060A o 1% ZXRE060

• Typical temperature drift

o <4 mV (0°C to 70°C) o <6 mV (-40°C to 85°C) o <12mV (-40°C to 125°C)

• 0.2V to 18V open-collector output

• High power supply rejection

o (>45dB at 300kHz)

• Lead Free by design/RoHS Compliant (Note 1)

• “Green”/Halogen free device (Note 2)

Pin Assignments

ZXRE060_H5 (SC70-5/SOT353) and ZXRE060_ET5

(TSOT23-5)

Top viewTop view

ZXRE060_FT4 (DFN1520H4-6)

Top view

6

PGND

1

6

5

N/C

2

5

OUT

3

4

Exposed flag floating or

connect to GND

Typical Application Circuit

IN

GND

FB

Applications

• Isolated DC-DC converters

• Core voltage POL

• Low Voltage Low-Dropout linear regulators

• Shunt regulators

• Adjustable voltage reference

Notes: 1. No purposefully added lead.

2. Diodes Inc.’s “Green” policy can be found on our website at http://www.diodes.com/products/lead_free/index.php.

ZXRE060

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Pin Description

(SC70-5 /SOT353,

TSOT23-5)

1 1 PGND

- 2 No connection 5 3 OUT 4 4 FB Feedback Input. Regulates to 600mV nominal. 2 5 GND

3 6 IN

- Flag Floating or connect to GND

(DFN)

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ZXRE060

0.6V ADJUSTABLE PRECISION SHUNT REGULATOR

Name Function

Power Ground: Ground return for emitter of output transistor: Connect PGND and GND together.

Output. Connect a capacitor close to device between OUT and GND. See the Applications Information section.

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.

Function Block Diagram

The ZXRE060 differs from most other shunt regulators in that it has separate input a nd output pins and a low voltage reference. This enables it to regulate rails down to 600mV and makes the part ideal for isolated power suppl y applications that use optocouplers 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 volta ge range of 0.2V to 18V ena bles the ZXRE060 to be powered from an auxiliary rail, while controlli ng a master rail which is above the auxiliar y rail voltage, or belo w the minimum V allows it to operate as a low-dropout voltage regulator for microprocessor/DSP/PLD cores.

As with other shunt regulators (and shunt references), the ZXRE060 compares its internal amplifier FB pin to a high accurac y 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.

voltage. This

IN

ZXRE060

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0.6V ADJUSTABLE PRECISION SHUNT REGULATOR

Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)

Symbol Parameter Rating Unit

VIN IN Voltage relative to GND 20 V

V

OUT Voltage relative to GND 20 V

OUT

VFB FB Voltage relative to GND 20 V

P

PGND Voltage relative to GND -0.3 to +0.3 V

GND

I

OUT Pin Current 20 mA

OUT

TJ Operating Junction Temperture -40 to 150 °C

TST Storage Temperature 55 to 150 °C

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

P

Package θJA

TA = 25°C, TJ = 150°C

SC70-5/SOT353 400°C/W 310mW

TSOT23-5 250°C/W 500mW

DFN1520H4-6 TBD TBD

DIS

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ZXRE060

Recommended Operating Conditions

Symbol Parameter Min Max Units

VIN IN Voltage Range (0 to 125°C) 2 18 VIN IN Voltage Range (-40 to 0°C) 2.2 18

V

OUT Voltage Range 0.2 18

OUT

I

OUT Pin Current 0.3 15 mA

OUT

TA

Operating Ambient Temperature Range

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ZXRE060

0.6V ADJUSTABLE PRECISION SHUNT REGULATOR

Electrical Characteristics

= 25°C, VIN = 3.3V, V

T

A

Symbol Parameter Conditions Min Typ Max Units

VFB Feedback voltage

OUT

= VFB, I

= 5mA unless otherwise stated (Note 3).

OUT

TA = 0°C to 85°C

TA = -40°C to 85°C

ZXRE060A 0.597 0.6 0.603 ZXRE060 0.594 0.6 0.606 ZXRE060A 0.595 0.605 ZXRE060 0.592 0.608

ZXRE060A 0.594 0.606 ZXRE060 0.591 0.609

V

TA = -40°C to 125°C

ZXRE060A 0.593 0.607 ZXRE060 0.590 0.610

FB

LOAD

LINE

OVR

IFB

Feedback pin load regulation

Feedback pin line regulation

Output voltage regulation

FB input bias current

I

= 1 to 15mA

OUT

V

= 2V to 18V 0.1 1

IN

V

= 2.2V to 18V TA = -40 to 125°C 1.5

IN

V

= 0.2V to 18V,

OUT

I

=1mA

OUT

(Ref. Figure 1)

V

= 18V

IN

= 2V to 18V

V

IN

V

= 2.2V to 18V TA = -40 to 125°C 1

IN

I

OUT

=0.3mA

3.8 6 TA = -40 to 125°C 10

mV

mV 1 TA = -40 to 125°C

1.5

-45 TA = -40 to 125°C -200 0

mV

nA

0.35 0.7

mA

IIN Input current

V

= 2V to 18V

IN

V

= 2.2V to 18V TA = -40 to 125°C 1.5

IN

V

= 18V,

I

OUT(LK)

Z

PSRR

BW

Note: 3. 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, characterisation and process control.

OUT leakage current

Dynamic Output

OUT

Impedance Power supply rejection ratio Amplifier Unity Gain Frequency Amplifier

G

Transconductance

IN

V

= 18V,

OUT

V

=0V

FB

I

= 1 to 15mA

OUT

f < 1kHz f=300kHz V

= 0.3VPP

AC

Ref: Fig 2

I

OUT

=10mA

0.48 1

mA

0.1 TA = 125°C

1

0.25 0.4 TA = -40 to125°C 0.6

>45 dB

600 kHz

5000 mA/V

µA

Ω

ZXRE060

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