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| ZLDO1117 1A Low Dropout Positive Regulator 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and Adjustable outputs Description ZLDO1117 is a low dropout positive adjustable or fixedmode regulator with 1A output current capability. The ZLDO1117 has a 2% tolerance across the industrial temperature range and is guaranteed to have lower than 1.2V dropout at full load current making it ideal to provide well-regulated outputs of 1.2V to 5.0V with input supply voltages up to 18V. The ZLDO1117 is ideally suited to provide well-regulated supplies for low voltage IC applications such as highspeed bus termination and low current 3.3V logic supply across the whole industrial temperature range. Pin Assignments SOT223 TO252 Features * * * * * * * * 1.2V Maximum Dropout at Full Load Current 2% tolerance over temperature, line and load variations Fast Transient Response Output Current Limiting Built-in Thermal Shutdown Good Noise Rejection Suitable for use with MLCC capacitors -40 to 125C Junction temperature range Available in "Green" Molding Compound (No Br, Sb) with lead free Finish/RoHS Compliant (Note 1) * Typical Application circuit 1A I/O - 1.8V core regulator ZLDO1117-18 3.3V 4.7F MLCC 1.8V 4.7F MLCC Issue 1 1 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Absolute Maximum Ratings Parameter ........................................................................................................................................................................ Rating Input Supply Voltage (VIN) relative to GND ............................................................................................................... -0.3 to 18V 3 Junction Temperature (TJ) .............................................................................................................................................. 150C Power Dissipation ............................................................................................................................................ See SOA curve Storage Temperature (TST)....................................................................................................................................-65 to +150C 1.2 1 0.8 ILOAD (A) 0.6 SOA 0.4 0.2 0 0 5 10 15 VIN - VOUT (V) 20 25 Safe Operation Area (SOA) Curve 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. Human Body Model: ................................................. 4kV Machine Model: ..................................................... 400V Recommended operating conditions Parameter VIN Input voltage IO Output current TJ Operating Junction Temperature Range Package Thermal Data Thermal Resistance Package Junction-to-Ambient, JA Junction-to-Case, JC SOT223-3L TO252-3L5 SOT223-3L4 TO252-3L5 4 Min 2.7 0.01 -40 Unit C/W C/W 6 Max 18 1 125 Unit V A C 107 73 16 12 Notes: 3. ZLDO1117 contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature exceeded. When activated, typically at 150C, the regulator Output switches off and then back on as the die cools. 4. Test condition for SOT223-3L: TA = 27C, no air flow, device mounted on 2"X2" polyimide PCB, 2 oz copper, 5.6mmX5.6mm pad. 5. Test condition for TO252-3L: TA = 27C, no air flow, device mounted on 2"X2" polyimide PCB, 1 oz copper, 2cmX2cm pad. 6. Ensures correct operation without entering dropout. Device will continue to operate below this minimum input voltage under dropout conditions. Issue 1 2 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Electrical Characteristics (Under Operating Conditions) Parameter Reference Voltage Conditions ZLDO1117-ADJ ZLDO1117-1.2 ZLDO1117-1.5 ZLDO1117-1.8 Output Voltage ZLDO1117-2.5 ZLDO1117-3.3 ZLDO1117-5.0 ZLDO1117-ADJ Line Regulation ZLDO1117-xx ZLDO1117-ADJ ZLDO1117-1.2 ZLDO1117-1.5 Load Regulation ZLDO1117-1.8 ZLDO1117-2.5 ZLDO1117-3.3 ZLDO1117-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current (Note 8) Quiescent current GND current Thermal Regulation Ripple Rejection Temperature Stability Notes: 7. 8. TA (VIN-VOUT) = 2V, IO = 10mA VOUT+1.4V < VIN < 10V, 10mA < IO < 1A IO = 10mA, VIN = 3.2V 0 < IO < 1A, 2.6V < VIN < 12V IO = 10mA, VIN = 3.5V 0 < IO < 1A, 2.9V < VIN < 12V IO = 10mA, VIN = 3.8V 0 < IO < 1A, 3.2V < VIN < 12V IO = 10mA, VIN = 4.5V 0 < IO < 1A, 3.9V < VIN < 12V IO = 10mA, VIN = 5.3V 0 < IO < 1A, 4.7V < VIN < 12V IO = 10mA, VIN = 7V 0 < IO < 1A, 6.4V < VIN < 12V IO = 10mA, VOUT+1.5V Typ. 1.250 Max 1.263 1.275 Unit V V V V V V V % % % % mV mV mV mV mV V 1.200 1.500 1.800 2.500 3.300 5.000 ZLDO1117ADJ/1.2/1.5/1.8 /2.5/3.3/5.0 ZLDO1117ADJ/1.2/1.5/1.8 /2.5/3.3/5.0 ZLDO1117-ADJ 1.11 1.212 1.224 1.515 1.530 1.818 1.836 2.525 2.550 3.333 3.365 5.05 5.100 0.1 0.2 0.1 0.2 0.2 0.4 0.2 0.4 3 6 4 8 5 10 6.6 13 10 20 1.2 1.3 1.35 1. 1 2 4 35 60 80 0.5 5 10 120 0.1 A mA mA A %/W dB % ZLDO1117-xx VIN < 18V, IO = 0mA ZLDO1117-xx VIN = 7V 30ms pulse f = 120Hz, COUT = 25uF Tantalum, IOUT = 100mA, ZLDO1117-XXX VIN = VOUT+3V IO = 10mA See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18" from the package. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Issue 1 3 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Typical characteristics 0.5 0.06 Adjustable version ILOAD = 10mA 0.4 0.05 0.04 0.03 0.02 0.01 0 VOUT+1.5V Vout (%) 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (C) Line Regulation (%) 0.2 -0.01 -50 -25 0 25 50 Temperature (C) 75 100 125 Output voltage variation vs Temperature 0.25 1.4 1.3 0.2 Load Regulation (%) VIN=3.3V, 10mA TJ = 25C VOUT = 1% of VOUT 0.15 0.1 0.05 0.2 0.4 IOUT (A) 0.6 0.8 1 Load regulation vs temperature Dropout vs Temperature 1.4 Drop-out voltage vs current 70 60 1.3 50 IADJ (A) 1.2 Dropout (V) IOUT=1A VOUT = 1% of VOUT 40 30 20 10 0 1.1 1 0.9 0.8 -50 -25 0 25 50 Temperature (C) 75 100 125 -50 -25 0 25 50 Temperature (C) 75 100 125 Drop-out voltage vs temperature Adjust pin input current Issue 1 4 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 ZLDO1117-2.5V CIN = 1F, COUT = 10F TANT IPRELOAD = 100mA, Istep = 500mA 10mV 0 -10mV 10mV 0 -10mV ZLDO1117-2.5V CIN = 1F, COUT = 4.7F MLCC IPRELOAD = 100mA, ISTEP = 500mA 600mA 100mA 600mA 100mA Transient load regulation with 10F tantalum capacitor Transient load regulation with 4.7F MLCC capacitor ZLDO1117 2.5V CIN = 1F, COUT = 4.7F MLCC ILOAD = 100mA 10 0 5V 4V 10s/div Transient line regulation with 4.7F MLCC capacitor 90 85 Ripple Rejection (dB) 80 75 70 65 60 55 50 10 100 1,000 Frequency (Hz) 10,000 100,000 ILOAD = 100mA, VIN - VOUT = 3V Ripple rejection Issue 1 5 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Pin Descriptions NAME Adj (GND) VOUT I/O I O Pin # 1 2 FUNCTION A resistor divider from this pin to the VOUT pin and ground sets the output voltage (Ground only for Fixed-Mode). The output of the regulator. A minimum of 4.7F capacitor (0.05 ESR 0.5) must be connected from this pin to ground to insure stability. For improved ac load response a larger output capacitor is recommended. The input pin of regulator. Typically a large storage capacitor (0.05 ESR 0.5) is connected from this pin to ground to ensure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.3V higher than VOUT in order for the device to regulate properly. VIN I 3 Applications information The ZLDO1117 family of quasi-LDO regulators is easy to use. They are protected against short circuit and thermal overloads. (see block diagram). Thermal protection circuitry will shut down the regulator should the junction temperature exceed 150C at the sense point. The ZLDO1117 is pin compatible with similar `1117 regulators and offers extended temperature range and improved regulation specifications. Operation The ZLDO1117 develops a 1.25V reference voltage between the output and the adjust terminal (see block diagram). By placing a resistor between these two terminals, a constant current is caused to flow through R1 and down through R2. For fixed output variants Resistors R1 and R2 are internal. Stability The ZLDO1117 requires an output capacitor as part of the device frequency compensation. As part of its improved performance over industry standard 1117 the ZLDO1117 is suitable for use with MLCC (Multi Layer Ceramic Chip) capacitors. A minimum of 4.7F ceramic X7R, 4.7F tantalum, or 47 F of aluminum electrolytic is required. The ESR of the output capacitor should be less than 0.5. Surface mount tantalum capacitors, which have very low ESR, are available from several manufacturers. When using MLCC capacitors avoid the use of Y5V dielectrics. Load Regulation For improved load regulation the ZLDO1117-ADJ should have the upper feedback resistor, R1, connected as close as possible to VOUT and the lower resistor, R2, connected as close as possible to the load GND return. This helps reduce any parasitic resistance in series with the load. Thermal Considerations ZLDO1117 series regulators have internal thermal limiting circuitry designed to protect the device during overload conditions. For continuous normal load conditions however, the maximum junction temperature rating of 125C must not be exceeded. It is important to give careful consideration to all sources of thermal resistance from junction to ambient. For the SOT-223 and TO-252 packages, which are designed to be surface mounted, additional heat sources mounted near the device must also be considered. Heat sinking is accomplished using the heat spreading capability of the PCB and its copper traces. The JC (junction to tab) of the TO-252 and SOT223 are 12C/W and 16C/W respectively. Issue 1 6 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Thermal resistances from tab to ambient can be as low as 30C/W. The total thermal resistance from junction to ambient can be as low as 42~46C/W. This requires a reasonable sized PCB with at least one layer of copper to spread the heat across the board and couple it into the surrounding air. Datasheet specifications using 2 oz copper and a 5mmx5mm pad with TA=27C, no air flow yielded JA (junction to tab) of 73C/W and 107C/W for TO-252 and SOT223 respectively. The thermal resistance for each application will be affected by thermal interactions with other components on the board. Some experimentation will be necessary to determine the actual value. Ripple Rejection When using the ZLDO1117 adjustable device the adjust terminal can be bypassed to improve ripple rejection. When the adjust terminal is bypassed the required value of the output capacitor increases. The device will require an output capacitor of 22F tantalum or 150F aluminum electrolytic when the adjust pin is bypassed. Normally, capacitor values on the order of 100F are used in the output of many regulators to ensure good load transient response with large load current changes. Output capacitance can be increased without limit and larger values of output capacitance further improve stability and transient response. The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. These curves will hold true for all values of output voltage. For proper bypassing, and ripple rejection approaching the values shown, the impedance of the adjust pin capacitor, at the ripple frequency, should be < R1. R1 is normally in the range of 100 to 200. The size of the required adjust pin capacitor is a function of the input ripple frequency. At 120Hz, with R1 = 100, the adjust pin capacitor should be >13F. At 10kHz only 0.16F is needed. For fixed voltage devices, and adjustable devices without an adjust pin capacitor, the output ripple will increase as the ratio of the output voltage to the reference voltage (VOUT/VREF). For example, with the output voltage equal to 5V, the output ripple will be increased by the ratio of 5V/1.25V. It will increase by a factor of four. Ripple rejection will be degraded by 12dB from the value shown on the curve. Issue 1 7 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Typical application circuits Using R2 VOUT = 1.25 * 1 + R1 then the output voltage becomes: 330 VOUT = 1.25 * 1 + = 5.0 V 110 Figure 1 Basic adjustable regulator with 5V output 1N4002 (See Note D) ZLDO1117 Vin IN ADJ IADJ 10 F (see Note C) CADJ (see Note B) R2 OUT VREF R1 Vout 100 F (see Note A) Figure 2 Adjustable regulator with IADJ errors R2 VOUT = 1.25 * 1 + + IADJ * R2 R1 Because IADJ typically is 55A, its effect is negligible in most applications. 330 VOUT = 1.25 * 1 + + 55 * 10 - 6 * 330 = 5.02V ~ 0.4% 110 Output capacitor selection is critical for regulator stability. Larger Cout values benefit the regulator by improving transient response and loop stability. CADJ can be used to improve ripple rejection. If CADJ is used, a Cout that is larger in value than CADJ must be used. Cin is recommended if ZLDO1117 is not located near the power supply filter. An external diode is recommended to protect the regulator if the input instantaneously is shorted to GND. This device is designed to be stable with tantalum and MLCC capacitors with an ESR less than 0.47. A. B. C. D. E. Issue 1 8 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Other typical circuits Figure 3 ZLDO1117 with extended output voltage VIN ZLDO1117 IN ADJ C1 10 F OUT R1 121 1% VOUT C2 100 F TTL R3 1k R4 1k T1 MMBT3904 R2 365 1% Figure 4 ZLDO1117 with disable function Figure 5 ZLDO1117 as a negative LDO Issue 1 9 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Ordering information Packaging (Note 3) ZLDO1117K12TC TO252-3L 1.2V ZLDO1117G12TA SOT223-3L ZLDO1117KTC TO252-3L Adjustable ZLDO1117GTA SOT223-3L ZLDO1117K15TC TO252-3L 1.5V ZLDO1117G15TA SOT223-3L ZLDO1117K18TC TO252-3L 1.8V ZLDO1117G18TA SOT223-3L ZLDO1117K25TC TO252-3L 2.5V ZLDO1117G25TA SOT223-3L ZLDO1117K33TC TO252-3L 3.3V ZLDO1117G33TA SOT223-3L ZLDO1117K50TC TO252-3L 5.0V ZLDO1117G50TA SOT223-3L Device Notes: Output voltage Status Preview Preview Active Active Active Active Active Active Active Active Active Active Active Active Reel Quantity 2500 1000 2500 1000 2500 1000 2500 1000 2500 1000 2500 1000 2500 1000 Tape width 16 mm 12 mm 16 mm 12 mm 16 mm 12 mm 16 mm 12 mm 16 mm 12 mm 16 mm 12 mm 16 mm 12 mm Reel size 13" 7" 13" 7" 13" 7" 13" 7" 13" 7" 13" 7" 13" 7" 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. 2. Pad layout as shown on Diodes Inc. suggested pad layout document ZLDO02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. Issue 1 10 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 Package outlines SOT223 TO252 Issue 1 11 of 12 June 2009 www.diodes.com (c)Diodes Incorporated ZLDO1117 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. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safetycritical, life support devices or systems. Copyright (c) 2009, Diodes Incorporated www.diodes.com Issue 1 12 of 12 June 2009 www.diodes.com (c)Diodes Incorporated |
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