ADP2303-EVALZ Analog Devices Inc, ADP2303-EVALZ Datasheet
ADP2303-EVALZ
Specifications of ADP2303-EVALZ
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ADP2303-EVALZ Summary of contents
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... which makes them suitable for a wide range of applications. The output voltage of the ADP2302/ ADP2303 can be down to 0.8 V for the adjustable version, while the fixed output version is available in preset output voltage options of 5.0 V, 3.3 V, and 2.5 V. The 700 kHz operating frequency allows small inductor and ceramic capacitors to be used, providing a compact solution ...
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... ADP2302/ADP2303 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Applications Circuit............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Functional Block Diagram ............................................................ 13 Theory of Operation ...................................................................... 14 Basic Operation .......................................................................... 14 PWM Mode................................................................................. 14 Power Saving Mode.................................................................... 14 Bootstrap Circuitry .................................................................... 14 Precision Enable ...
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... No switching VIN SHDN EN IN UVLO V rising IN V falling IN V ADP230xARDZ (adjustable) FB ADP230xARDZ-2.5 ADP230xARDZ-3.3 ADP230xARDZ-5.0 I ADP230xARDZ (adjustable − 200 mA BST SW SW ADP2302, V − BST SW ADP2303, V − BST BOOT PGOOD Rising temperature Rev Page ADP2302/ADP2303 Min Typ Max Unit 3 720 950 μ μA 2 ...
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... ADP2302/ADP2303 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VIN, EN, PGOOD SW BST to SW FB, NC Operating Junction Temperature Range Storage Temperature Range Soldering Conditions Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied ...
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... TOP VIEW (Not to Scale) PGOOD NOTES CONNECT. 2. THE EXPOSED PAD SHOULD BE SOLDERED TO AN EXTERNAL GROUND PLANE UNDERNEATH THE IC FOR THERMAL DISSIPATION. Figure 3. Pin Configuration (Top View) directly. OUT and a catch diode to GND from this pin. OUT Rev Page ADP2302/ADP2303 . For OUT ...
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... Rev Page 100 OUT V OUT V OUT 60 V OUT V OUT 50 INDUCTOR: VLF10040T-4R7N5R4 DIODE: SSB43L 40 0 0.5 1.0 1.5 2.0 OUTPUT CURRENT (A) Figure 7. ADP2303 Efficiency 100 OUT V OUT V OUT 60 50 INDUCTOR: VLF10040T-6R8N4R5 DIODE: SSB43L 40 0 0.5 1.0 1.5 OUTPUT CURRENT (A) Figure 8. ADP2302 Efficiency ...
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... V (V) IN Figure 10. ADP2302 Line Regulation 3 OUT 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0. (V) IN Figure 11. ADP2303 Line Regulation 3 OUT (V) IN Figure 12. Shutdown Current vs. V 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 ...
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... Figure 20. ADP2303 Current-Limit Threshold vs. Temperature, V BST SW 1.30 1.25 1.20 1.15 1.10 1.05 1.00 –40 80 100 120 Rev Page – 100 TEMPERATURE (°C) Figure 19. 0.8 V Feedback Voltage vs. Temperature – ...
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... CH1 80 100 120 Figure 26. Continuous Conduction Mode (CCM CH2 7.50V CH1 = 3 OUT IN Rev Page ADP2302/ADP2303 – TEMPERATURE (°C) Figure 25. Minimum On Time vs. Temperature V (AC) OUT 5.00mV CH2 5.00V M1.00µs A CH2 W CH4 2.00A Ω T 30.00 OUT V (AC) OUT ...
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... M200µs W CH4 1.00A Ω T 20.00% Figure 30. ADP2302 Load Transient 6.8 μ × 22 μF OUT CH3 6.20V = 3 CH4 1.20A = 5 Figure 32. ADP2303 Load Transient OUT CH4 1.20A CH1 = 5 Figure 33. ADP2302 Load Transient OUT IN Rev Page OUT CH1 2.00V CH2 10.0V M1 ...
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... OUT V OUT CH1 20.0mV CH2 10.0V M1.00ms CH3 5.00V T 23.40% W Figure 35. ADP2303 Line Transient 4.7 μ × 47 μF OUT –16 –32 –48 CROSS FREQUENCY = 36kHz –64 PHASE MARGIN = 60° –80 1k 10k 100k FREQUENCY (Hz) Figure 36. ADP2302 Bode Plot 2 OUT L = 4.7 μ ...
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... PHASE MARGIN = 65° 1k 10k 100k FREQUENCY (Hz) Figure 42. ADP2303 Bode Plot 2 OUT L = 3.3 μ × 47 μF OUT CROSS FREQUENCY = 28kHz PHASE MARGIN = 65° 1k 10k 100k FREQUENCY (Hz) Figure 43. ADP2303 Bode Plot OUT L = 4.7 μ μF OUT 180 144 108 –36 –72 –108 –144 –180 ...
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... OVP 0.880V PGOOD 4 0.680V VIN 2 UVLO SHUTDOWN IC CURRENT OCP SENSE AMPLIFIER BOOT CURRENT REGULATOR LIMIT THRESHOLD 1.1V BIAS RAMP CLK GENERATOR GENERATOR FREQUENCY FOLDBACK (⅛ , ¼ , ½ 0.8V VOLTAGE REFERENCE ADP2302/ADP2303 7 GND Figure 44. Functional Block Diagram Rev Page ADP2302/ADP2303 BST OUT ...
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... MOSFET. This voltage should not exceed 5 case the BST pin is supplied with the external voltage source through a diode. The ADP2302/ADP2303 generate a typical 5.0 V bootstrap voltage for the gate drive circuit by differentially sensing and regulating the voltage between the BST and SW pins. There is a diode integrated on the chip that blocks the reverse voltage between the VIN and BST pins when the MOSFET switch is turned on ...
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... A 15°C hysteresis is included so that when thermal shutdown occurs, the ADP2302/ADP2303 do not return to operation until the on- chip temperature drops below 135°C. When the devices recover from thermal shutdown, a soft start is initiated. ...
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... The upper limit of the output voltage is constrained by the mini- mum controllable off time, which can be as high as 280 ns in ADP2302/ADP2303 for the worst case. By considering the variation of both the switching frequency and the input voltage, the equation for the upper limit of the output voltage is ...
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... Generally, the EN pin can connect to the VIN pin so that the device automatically starts up when the input power is applied. However, the precision enabling feature allows the ADP2302/ ADP2303 to be used as a programmable UVLO by connecting a resistive voltage divider to VIN, as shown in Figure 49. This configuration prevents the start-up problems that can occur when VIN ramps up slowly in soft start with a relatively high load current ...
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... Because the ADP2302/ ADP2303 are high frequency switching regulators, shielded fer- rite core materials are recommended for their low core losses and low EMI. Some recommended inductors are shown in Table 8 ...
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... VIN pin of the ADP2302/ADP2303. OUTPUT CAPACITOR The output capacitor selection affects both the output voltage ripple and the loop dynamics of the regulator. The ADP2302/ADP2303 are designed to operate with small ceramic capacitors that have low ESR and equivalent series inductance (ESL) and are, therefore, easily able to meet stringent output voltage ripple specifications ...
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... DESIGN EXAMPLE This section provides the procedures to select the external compo- nents, based on the example specifications listed in Table 10. The schematic for this design example is shown in Figure 51. Because the output current the ADP2303 is chosen for this application. Table 10. Step-Down DC-to-DC Regulator Requirements Parameter ...
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... Rev Page ADP2302/ADP2303 V = 3.3V OUT 4.7µH OUT1 OUT2 TOP 47µF 47µF 31.6kΩ 6.3V 6. BOT 10.2kΩ (kΩ ...
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... ADP2302/ADP2303 CIRCUIT BOARD LAYOUT RECOMMENDATIONS Good circuit board layout is essential to obtaining the best performance for ADP2302/ADP2303. Poor layout can affect the regulation and stability, as well as the electromagnetic interface (EMI) and electromagnetic compatibility (EMC) performance. A PCB layout example is shown in Figure 53. Refer to the following guidelines for a good PCB layout: ...
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... PGOOD FB GND Figure 56. ADP2302 Typical Application VIN BST ADP2302ARDZ-3.3 C BST 0.1µF SW PGOOD D B330B EN FB GND = 3 with Programmable 7.8 V UVLO IN OUT Rev Page ADP2302/ADP2303 V = 1.5V OUT OUT1 OUT2 TOP 47µF 47µF 10kΩ 6.3V 6. BOT 11.3kΩ 1 OUT V = 1.8V OUT ...
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... D B330B PGOOD FB GND Figure 58. ADP2302 Typical Application VIN BST C ADP2303ARDZ BST 0.1µ 2.5µH D SSB43L PGOOD FB GND Figure 59. ADP2303 Typical Application VIN BST C ADP2303ARDZ BST 0.1µ 3.3µH D SSB43L PGOOD FB GND Figure 60. ADP2303 Typical Application VIN BST ADP2303ARDZ ...
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... V = 12V IN VIN BST C IN ADP2303ARDZ-5.0 10µF 25V EN R PGOOD 100kΩ PGOOD GND Figure 62. ADP2303 Typical Application VIN BST C IN ADP2302ARDZ 10µF 25V PGOOD 100kΩ PGOOD FB GND Figure 63. ADP2302 Typical Application, V Rev Page BST 0.1µ OUT 4.7µH OUT1 D 47µ ...
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... ADP2302ARDZ-R7 Adjustable ADP2302ARDZ-2.5-R7 2.5 V ADP2302ARDZ-3.3-R7 3.3 V ADP2302ARDZ-5.0-R7 5.0 V ADP2302-EVALZ ADP2303ARDZ-R7 Adjustable ADP2303ARDZ-2.5-R7 2.5 V ADP2303ARDZ-3.3-R7 3.3 V ADP2303ARDZ-5.0-R7 5.0 V ADP2303-EVALZ RoHS Compliant Part. 5.00 (0.197) 4.90 (0.193) 2.29 (0.090) 4.80 (0.189) 2.29 (0.090 6.20 (0.244) TOP VIEW 6.00 (0.236 5.80 (0.228) BOTTOM VIEW 1 ...
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... NOTES Rev Page ADP2302/ADP2303 ...
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... ADP2302/ADP2303 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08833-0-7/10(0) Rev Page ...