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A Product Line of Diodes Incorporated
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 facilitating simple upgrade paths.
Pin Assignments
ZXRE060_H5 (SC70-5/SOT353) and ZXRE060_ET5 (TSOT23-5)
Top view
ZXRE060_FT4 (DFN1520H4-6)
Top view PGND
6
1
IN
N/C
2
5
GND
OUT
3
4
FB
Features
* * * Low reference voltage (VFB = 0.6V) -40 to 125C temperature range Reference voltage tolerance at 25C o 0.5% ZXRE060A o 1% ZXRE060 Typical temperature drift o <4 mV (0C to 70C) o <6 mV (-40C to 85C) o <12mV (-40C to 125C) 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)
Exposed flag floating or connect to GND
Typical Application Circuit
*
* * * *
Applications
* * * * * Isolated DC-DC converters Core voltage POL Low Voltage Low-Dropout linear regulators Shunt regulators Adjustable voltage reference
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.
Notes:
ZXRE060
Document number: DS33611 Rev. 6 - 2
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Pin Description
Pin (SC70-5 /SOT353, TSOT23-5) 1 5 4 2 3 Pin (DFN) 1 2 3 4 5 6 Flag OUT FB GND IN
Name PGND
Function 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. See the Applications Information section. Feedback Input. Regulates to 600mV nominal. Analog Ground: Ground return for reference and amplifier: Connect GND and PGND together. Supply Input. Connect a 0.1F ceramic capacitor close to the device from IN to GND. Floating or connect to GND
Function Block Diagram
The ZXRE060 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 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 voltage range of 0.2V to 18V enables the ZXRE060 to be powered from an auxiliary rail, while controlling a master rail which is above the auxiliary rail voltage, or below the minimum VIN 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 ZXRE060 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.
ZXRE060
Document number: DS33611 Rev. 6 - 2
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR
Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated)
Symbol VIN VOUT VFB PGND IOUT TJ TST 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 Temperture 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
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 SC70-5/SOT353 TSOT23-5 DFN1520H4-6 JA 400C/W 250C/W TBD PDIS TA = 25C, TJ = 150C 310mW 500mW TBD
Recommended Operating Conditions
Symbol VIN VIN VOUT IOUT TA Parameter IN Voltage Range (0 to 125C) IN Voltage Range (-40 to 0C) 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
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Electrical Characteristics
TA = 25C, VIN = 3.3V, VOUT = VFB, IOUT = 5mA unless otherwise stated (Note 3).
Symbol Parameter
Conditions ZXRE060A ZXRE060 ZXRE060A ZXRE060 ZXRE060A TA = -40C to 85C ZXRE060 ZXRE060A TA = -40C to 125C ZXRE060
TA = 0C to 85C VFB Feedback voltage
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
V
FBLOAD FBLINE FBOVR IFB
Feedback pin load regulation Feedback pin line regulation Output voltage regulation FB input bias current
IOUT = 1 to 15mA VIN = 2V to 18V VIN = 2.2V to 18V VOUT = 0.2V to 18V, IOUT =1mA (Ref. Figure 1) VIN = 18V VIN = 2V to 18V IOUT =0.3mA VIN = 2.2V to 18V
3.8 TA = -40 to 125C 0.1 TA = -40 to 125C TA = -40 to 125C -45 TA = -40 to 125C -200 0.35 TA = -40 to 125C 0.48 IOUT =10mA TA = -40 to 125C
6 10 1 1.5 1 1.5 0 0.7
mV mV mV nA mA
1 1 mA 1.5 0.1 A dB kHz mA/V
IIN
Input current VIN = 2V to 18V VIN = 2.2V to 18V
IOUT(LK) ZOUT PSRR BW G
Note:
OUT leakage current
Dynamic Output Impedance Power supply rejection ratio Amplifier Unity Gain Ref: Fig 2 Frequency Amplifier Transconductance
VIN = 18V, VOUT = 18V, VFB =0V IOUT = 1 to 15mA f < 1kHz f=300kHz VAC= 0.3VPP
TA = 125C 0.25 TA = -40 to125C >45 600 5000
1 0.4 0.6
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.
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Typical Characteristics
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Typical Operating Conditions (Cont.)
200 225
200 225
V OUT = 0.6V COUT = 2.2uF
150 180
150
V OUT = 6V COUT = 0.22uF
180
Phase (deg)
50
90
50
90
0
Gain Phas e
45
0
Gain Phase
45
-50 1 10 100 1k Frequency (Hz) 10k 100k 1M
0
-50 1 10 100 1k Frequency (Hz) 10k 100k 1M
0
Gain and Phase vs Frequency, V OUT=0.6V
Gain and Phase vs Frequency, V OUT=6V
50
50
Figure 2. Test circuits for gain and phase plots
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Phase (deg)
Gain (dB)
Gain (dB)
100
135
100
135
A Product Line of Diodes Incorporated
ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Application Information
The following show some typical application examples for the ZXRE060. It is recommended to include the compensation capacitor C2 to guarantee stability. C2 may range in value from 0.1F to 10F depending on the application. The time constant formed by C2 and R3 should be greater than 1ms multiplied by the feedback factor R2/(R1 + R2). Both C1 and C2 should be as close to the ZXRE060 as possible and connected to it with the shortest possible track. In the case of fig 9 and fig10, it means the opto-coupler will have to be carefully positioned to enable this.
1uF
Figure 3. 0.6V Shunt Regulator
VOUT = VREF
Figure 4. 1.0V Shunt Regulator
R1 VOUT = VREF 1 + R2
R3 =
VIN - VOUT IR3
1uF
Figure 5. 0.6V series LDO regulator
VOUT = VREF
Figure 6. 1.0V series LDO regulator
R1 VOUT = VREF 1 + R2
1. 2. 3.
Design guides Determine IOUT and choose a suitable transistor taking power dissipation into consideration. Determine IB from I = IOUT(max)
B (hFE(min) + 1)
Determine IR3 from
IR3 IB + IKA (min) .
The design of the ZXRE060 effectively means there is no IKA(min) limitation as in
4. 5.
conventional references. There is only an output leakage current which is a maximum of 1A. Nevertheless, it is necessary to determine an IKA(min) to ensure that the device operates within its linear range at all times. IKA(min) 10A should be adequate for this. Determine R3 from R3 = VIN - ( VOUT + VBE ) .
IR3
Although unlikely to be a problem, ensure that IR3 15 mA.
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ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Application Information (Continued)
R1 VOUT = VREF 1 + R2
( VOUT 0.2V + VBE )
R3 = VIN - VOUT IR3
Figure 7. 1V Current-boosted shunt regulator Design guides 1. 2. 3. 4. 5. Determine IOUT and choose a suitable transistor taking power dissipation into consideration. Determine IB from I = IOUT(max)
B (hFE(min) + 1)
Determine IR3 from Determine R3 from
IR3 = IOUT(max) R3 = VIN - VOUT IR3
6.
It is best to let the ZXRE060 supply as much current as it can before bringing Q1 into conduction. Not only does this minimise the strain on Q1, it also guarantees the most stable operation. Choose a nominal value between 10mA and <15mA for this current, IR4. Calculate R4 from R4 = VBE
IR4
VOUT goes low and LED is lit when monitored supply
R1 VM > VREF 1 + R2 V - ( VF + 0.2) R3 = IN IR3
15mA IR3 IF(MAX)
VF and IF are forward voltage drop and current of LED1.
Figure 8. 1.15V over-voltage indicator
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Application Information (Continued)
Figure 9. Opto-isolated 0.6V shunt regulator
VOUT = VREF
Figure 10. Opto-isolated 1.0V shunt regulator
R1 VOUT = VREF 1 + R2
V - ( VF + 0.2) R3 = IN IR3
15mA IR3 IF(MAX)
VF and IF are forward voltage drop and forward current respectively for the optocoupler LED. More applications information is available in the following publications which can be found on Diodes' web site. AN58 - Designing with Diodes' References - Shunt Regulation AN59 - Designing with Diodes' References - Series Regulation AN60 - Designing with Diodes' References - Fixed Regulators and Opto-Isolation AN61 - Designing with Diodes' References - Extending the operating voltage range AN62 - Designing with Diodes' References - Other Applications AN63 - Designing with Diodes' References - ZXRE060 Low Voltage Regulator
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Ordering Information
ZXRE060 X XXX XX
Tolerance A: 0.5% None: 1%
Package ET5: TSOT23-5 H5: SC70-5/SOT353 FT4: DFN2015H4-6
Identification Code S6A S6A S6A S06 S06 S06
Packing -7: Tape & Reel TA: Tape & Reel
Tol. 0.5%
Order Code ZXRE060AET5TA ZXRE060AH5TA ZXRE060AFT4-7 ZXRE060ET5TA ZXRE060H5TA ZXRE060FT4-7
Part TSOT23-5 SC70-5/SOT353 DFN1520H4-6 TSOT23-5 SC70-5/SOT353 DFN1520H4-6
Reel Size 7", 7", 7", 7", 7", 7", 180mm 180mm 180mm 180mm 180mm 180mm
Tape Width 8mm 8mm 8mm 8mm 8mm 8mm
Quantity/Reel 3000 3000 3000 3000 3000 3000
1%
Notes: 4. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf
Marking Information
1. TSOT23-5, SC70-7/SOT353
( Top View )
5 XXX 1 2
4
7
XXX : Identification code
3
2. DFN1520H4-6
( Top View ) XXX Y WX
1 2 3
XXX : Identification code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z : represents 52 and 53 X : A~Z : Internal Code
6
5
4
ZXRE060
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Package Outline Dimensions (All Dimensions in mm)
1. TSOT23-5
2. SC70-7/SOT353
3. DFN1520H4-6
DFN1520H4-6
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ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
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