ncp1529 ON Semiconductor, ncp1529 Datasheet
ncp1529
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ncp1529 Summary of contents
Page 1
... Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1529 is available in a space saving, low profile 2x2x0.5 mm UDFN6 package and TSOP-5 package. Features • ...
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... NCP1529 Type Analog Input Enable for switching regulators. This pin is active HIGH and is turned off by logic LOW on this pin. Analog / This pin is the GND reference for the NFET power stage and the analog Power Ground section of the IC. The pin must be connected to the system ground. ...
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... V battery VIN PWM/PFM CONTROL 4.7 mF GND LOGIC CONTROL Enable EN & THERMAL SHUTDOWN NCP1529 FUNCTIONAL BLOC DIAGRAM LIMIT FB REFERENCE VOLTAGE Figure 5. Simplified Block Diagram http://onsemi.com 3 2 ...
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... Board recommended TSOP-5 and UDFN6 layouts are described on Layout Considerations section. 1200 1000 800 600 400 200 0 -40 - AMBIENT TEMPERATURE (°C) A Figure 7. Power Derating NCP1529 Symbol , high I ), special care must be paid to thermal dissipation issues. Board design IN OUT 1200 UDFN6 UDFN6 1000 800 TSOP-5 600 400 200 0 ...
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... Thermal Shutdown Threshold Thermal Shutdown Hysteresis 10. Functionality guaranteed per design and characterization, see chapter ”USB Rail Powered Applications”. 11. The overall output voltage tolerance depends upon the accuracy of the external resistor (R1 and R2). NCP1529 = +25°C, Min and Max values are referenced -40° 3 ...
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... START I Short Circuit Protection PK V Under Voltage Lockout Threshold UVLO Enable Threshold Phase & Gain Performance NCP1529 vs. Output Current vs. Input Voltage vs. Input Voltage vs. Ambient Temperature vs. Load Current vs. Output Current vs. Ambient Temperature vs. Ambient Temperature http://onsemi.com 6 Figure 10, 11 ...
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... Figure 10. Efficiency vs. Output Current ( OUT 100 200 400 600 I , OUTPUT CURRENT (mA) OUT Figure 12. Efficiency vs. Output Current (V = 3.6 V, Temperature = 255C) IN NCP1529 4.5 5.0 5.5 2.5 3.0 Figure 9. Quiescent Current vs. Input Voltage 100 90 80 -40° 85° 800 1000 0 200 Figure 11 ...
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... Figure 14. Load Regulation vs. Output Current ( OUT Figure 16 100 mA Load Transient 3 1.2 V, Temperature = 255C) IN OUT Figure 18. 3 3.6 V Line Transient, Rise = 1 100 mA, Temperature = 255C) IN OUT NCP1529 3.0 2.0 1.0 -40°C 0 -1.0 -2.0 -3.0 800 1000 2.7 3.2 V Figure 15. Line Regulation vs. Input Voltage (V = 1.2 V, Temperature = 255C) OUT Figure 17 ...
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... T , AMBIENT TEMPERATURE (°C) A Figure 22. Undervoltage Lockout Threshold vs. Ambient Temperature -10 - NCP1529 = 1.2 V, Figure 21. Short-Circuit Protection (V OUT OUT 1.2 1.1 UVLOrise 1.0 0.9 UVLOfall 0.8 0.7 0.6 0.5 0.4 75 100 125 -40 Figure 23. Enable Threshold Voltages vs. Phase Gain 100 1000 10000 100000 FREQUENCY (Hz) Figure 24 ...
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... As shown on Figure 1, only six external components are required. The part uses an internal reference voltage of 0 recommended to keep NCP1529 in shutdown mode until the input voltage is 2 higher. PWM Operating Mode In this mode, the output voltage of the device is regulated by modulating the on-time pulse width of the main switch fixed 1 ...
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... USB Rail Powered Applications For USB rail powered applications, NCP1529 is able to supply voltages up to 3.9 V, 600 mA, operating in PWM mode only, with high efficiency (Figure 27), low output voltage ripple and good load regulation results over all current range (Figure 28) ...
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... The maximum RMS current occurs at 50% duty cycle with maximum output current, which is IO, max/2. For NCP1529, a low profile ceramic capacitor of 4.7 mF should be used for most of the cases. For effective bypass results, the input capacitor should be placed as close as possible to the VIN Pin Table 1 ...
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... LAYOUT CONSIDERATIONS capacitor is recommended to meet compensation requirements. A four layer PCB with a ground plane and a power plane will help NCP1529 noise immunity and loop stability. Thermal Layout Considerations High power dissipation in small package leads to thermal consideration such as: • Enlarge V power plane. ...
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... C SEATING 0.05 PLANE H T *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCP1529 PACKAGE DIMENSIONS TSOP-5 CASE 483-02 ISSUE G NOTES: 1. DIMENSIONING AND TOLERANCING PER 2. CONTROLLING DIMENSION: MILLIMETERS MAXIMUM LEAD THICKNESS INCLUDES M 4 ...
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... K 6X BOTTOM VIEW The product described herein (NCP1529), may be covered by the following U.S. patents: TBD. There may be other patents pending. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...