A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Pin Assignments 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. ZXRE060_H5 (SC70-5/SOT353) and ZXRE060_ET5 (TSOT23-5) Top view ZXRE060_FT4 (DFN1520H4-6) Top view 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. • • • • • 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) 1 6 IN N/C 2 5 GND OUT 3 4 FB Exposed flag floating or connect to GND Features • • • PGND Typical Application Circuit 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 Document number: DS33611 Rev. 6 - 2 1 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Pin Description Pin (SC70-5 /SOT353, TSOT23-5) Pin (DFN) Name 1 1 PGND - 2 5 3 OUT 4 4 FB 2 5 GND 3 6 IN - Flag 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 0.1μF 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 2 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated 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 θJA SC70-5/SOT353 TSOT23-5 DFN1520H4-6 400°C/W 250°C/W TBD PDIS TA = 25°C, TJ = 150°C 310mW 500mW TBD Recommended Operating Conditions Symbol VIN VIN VOUT IOUT TA Parameter IN Voltage Range (0 to 125°C) IN Voltage Range (-40 to 0°C) OUT Voltage Range OUT Pin Current Operating Ambient Temperature Range ZXRE060 Document number: DS33611 Rev. 6 - 2 Min 2 2.2 0.2 0.3 Max 18 18 18 15 Units -40 125 °C 3 of 12 www.diodes.com V mA March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Electrical Characteristics TA = 25°C, VIN = 3.3V, VOUT = VFB, IOUT = 5mA unless otherwise stated (Note 3). Symbol Parameter Conditions TA = 0°C to 85°C VFB Feedback voltage ZXRE060A ZXRE060 ZXRE060A ZXRE060 Min 0.597 0.594 0.595 0.592 ZXRE060A Typ 0.6 0.6 Max 0.603 0.606 0.605 0.608 Units 0.594 0.606 V ZXRE060 0.591 0.609 ZXRE060A 0.593 0.607 ZXRE060 0.590 0.610 TA = -40°C to 85°C TA = -40°C to 125°C Feedback pin load regulation Feedback pin line regulation FBLOAD FBLINE Output voltage regulation FBOVR FB input bias current IFB 3.8 IOUT = 1 to 15mA TA = -40 to 125°C VIN = 2V to 18V VIN = 2.2V to 18V VOUT = 0.2V to 18V, IOUT =1mA (Ref. Figure 1) 0.1 TA = -40 to 125°C TA = -40 to 125°C 6 10 1 1.5 1 1.5 -45 VIN = 18V TA = -40 to 125°C VIN = 2V to 18V -200 0 0.35 IIN mV nA mA TA = -40 to 125°C 1 Input current 0.48 VIN = 2V to 18V 1 IOUT =10mA VIN = 2.2V to 18V OUT leakage current IOUT(LK) VIN = 18V, VOUT = 18V, VFB =0V IOUT = 1 to 15mA f < 1kHz f=300kHz VAC= 0.3VPP Dynamic Output Impedance Power supply rejection ratio Amplifier Unity Gain Ref: Fig 2 Frequency Amplifier Transconductance ZOUT PSRR BW G Note: mV 0.7 IOUT =0.3mA VIN = 2.2V to 18V mV mA TA = -40 to 125°C 1.5 0.1 TA = 125°C 1 0.25 TA = -40 to125°C 0.4 0.6 µA Ω >45 dB 600 kHz 5000 mA/V 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 Document number: DS33611 Rev. 6 - 2 4 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Typical Characteristics ZXRE060 Document number: DS33611 Rev. 6 - 2 5 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Typical Operating Conditions (Cont.) 200 225 200 225 150 180 100 135 100 135 50 90 50 90 0 45 Gain (dB) 180 Phase (deg) Gain (dB) 150 0 45 Gain Gain Phas e Phase -50 0 1 10 Phase (deg) V OUT = 6V COUT = 0.22uF V OUT = 0.6V COUT = 2.2uF 100 1k 10k 100k 1M -50 0 1 10 100 1k 10k 100k 1M Frequency (Hz) Frequency (Hz) Gain and Phase vs Frequency, V OUT=0.6V Gain and Phase vs Frequency, V OUT=6V 50Ω 50Ω Figure 2. Test circuits for gain and phase plots ZXRE060 Document number: DS33611 Rev. 6 - 2 6 of 12 www.diodes.com March 2011 © Diodes Incorporated 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 0.1µF to 10µF 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 Figure 4. 1.0V Shunt Regulator R1 ⎞ ⎛ VOUT = VREF ⎜1 + ⎟ R2 ⎠ ⎝ VOUT = VREF R3 = VIN − VOUT IR3 1uF Figure 6. 1.0V series LDO regulator Figure 5. 0.6V series LDO regulator R1 ⎞ ⎛ VOUT = VREF ⎜1 + ⎟ R2 ⎠ ⎝ VOUT = VREF 1. 2. Design guides Determine IOUT and choose a suitable transistor taking power dissipation into consideration. Determine IB from I = IOUT(max) B (hFE(min) + 1) 3. Determine IR3 from IR3 ≥ IB + IKA (min) . The design of the ZXRE060 effectively means there is no IKA(min) limitation as in 4. conventional references. There is only an output leakage current which is a maximum of 1µA. Nevertheless, it is necessary to determine an IKA(min) to ensure that the device operates within its linear range at all times. IKA(min) ≥ 10µA should be adequate for this. Determine R3 from R3 = VIN − ( VOUT + VBE ) . 5. Although unlikely to be a problem, ensure that IR3 ≤ 15 mA. IR3 ZXRE060 Document number: DS33611 Rev. 6 - 2 7 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated 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. Determine IOUT and choose a suitable transistor taking power dissipation into consideration. Determine IB from I = IOUT(max) 3. Determine IR3 from IR3 = IOUT(max) 4. Determine R3 from R3 = 5. 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 6. B (hFE(min) + 1) VIN − VOUT IR3 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 Document number: DS33611 Rev. 6 - 2 8 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Application Information (Continued) Figure 9. Opto-isolated 0.6V shunt regulator Figure 10. Opto-isolated 1.0V shunt regulator R1 ⎞ ⎛ VOUT = VREF ⎜ 1 + ⎟ R2 ⎠ ⎝ VOUT = VREF 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 Document number: DS33611 Rev. 6 - 2 9 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated ZXRE060 0.6V ADJUSTABLE PRECISION SHUNT REGULATOR Ordering Information ZXRE060 X XXX XX Tolerance A: ±0.5% None: ±1% Tol. 0.5% 1% Package ET5: TSOT23-5 H5: SC70-5/SOT353 FT4: DFN2015H4-6 Order Code Part ZXRE060AET5TA ZXRE060AH5TA ZXRE060AFT4-7 ZXRE060ET5TA ZXRE060H5TA ZXRE060FT4-7 TSOT23-5 SC70-5/SOT353 DFN1520H4-6 TSOT23-5 SC70-5/SOT353 DFN1520H4-6 Identification Code S6A S6A S6A S06 S06 S06 Packing -7: Tape & Reel TA: Tape & Reel Reel Size 7”, 7”, 7”, 7”, 7”, 7”, 180mm 180mm 180mm 180mm 180mm 180mm Tape Width Quantity/Reel 8mm 8mm 8mm 8mm 8mm 8mm 3000 3000 3000 3000 3000 3000 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 ) 4 7 5 XXX : Identification code XXX 1 2 3 2. DFN1520H4-6 4 5 6 ( Top View ) XXX 3 2 1 Y WX 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 ZXRE060 Document number: DS33611 Rev. 6 - 2 10 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated 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 ZXRE060 Document number: DS33611 Rev. 6 - 2 11 of 12 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated 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. 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