FAN4603 Fairchild Semiconductor, FAN4603 Datasheet
![no-image](/images/manufacturer_photos/0/2/252/fairchild_semiconductor_sml.jpg)
FAN4603
Related parts for FAN4603
FAN4603 Summary of contents
Page 1
... Other voltage options are available on request. Contact a Fairchild representative. © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 Description The FAN4603 is a fully integrated synchronous DC/DC buck converter that provides up to 600mA of output current over an input voltage ranging from 2.3V to 5.5V. It provides a fixed output voltage level ranging from 1.0V to 1.8V. Other voltage options are available on request ...
Page 2
... GND Ground. Power and IC ground. All signals are referenced to this pin. P1 GND Optional Ground Connection. Not typically used. © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 Figure 1. Typical Application . This pin must be shorted directly to VOUT (Pin 4). OUT 2 Figure 3. 3D Package View ...
Page 3
... Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with a two- layer 2s0p board in accordance to the JESD51- JEDEC standard. Special attention must be paid not to exceed junction temperature given ambient temperature T J(max) © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 Parameter Human Body Model JESD22-A114 Charged Device Model, JESD22-C101 Parameter (2) ...
Page 4
... Thermal Shutdown Hysteresis HYS Note: 3. PWM frequency may be lower than specified when limited by t duty cycle extremes, but output regulation is maintained. © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0 -40°C to +85°C, using circuit of Figure 1. Typical values are Conditions ...
Page 5
... Output Current (mA) Figure 6. 1.82V OUT -10 0 100 200 300 Output Current (mA) Figure 8. 1.82V Regulation (Normalized) OUT © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 = 25°C 100% 90% 80% 1.82VOUT 70% 1.5VOUT 1.3VOUT 1.23VOUT 60% 1.0VOUT 50% 100 1000 1 =3.7V IN ...
Page 6
... Output Current (mA) Figure 12. 1.23V Efficiency Over Temperature OUT Figure 14. 1.82V PFM / PWM Boundary OUT © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 = 25°C 100% 3.3VIN 3.3VIN, 2.2uF 90% 5.0VIN 5.0VIN, 2.2uF 80% 70% 60% 50% 400 500 600 (1.5µ ...
Page 7
... T IN Figure 16. Quiescent Current Over Temperature (EN=V Figure 18. 1.82V Startup, 3.7V OUT Figure 20. 1.82V Startup into Pre-Charged Output, OUT 3.7V , 300mA Load IN © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 = 25°C Figure 17 Load Figure 19. IN Figure 21. 7 Shutdown Current Over Temperature (EN=0V) 1 ...
Page 8
... Figure 24. 1.82V Load Transient, 10-160mA, OUT t /t =100ns with Optional 2.2µ Figure 26. 1.82V Line Transient, 3.6-4.2V OUT with 10mA Load © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 = 25°C Figure 23. 1.82V Figure 25. t OUT =10µs, Figure 27. 1.82V ...
Page 9
... Enable and Soft-Start When EN is LOW, all circuits in FAN4603 are off and the IC draws ~100nA of current. When EN is HIGH and V above its UVLO threshold, the regulator begins a soft-start cycle. The output ramp during soft-start is a fixed slew rate of 50mV/μ ...
Page 10
... C Minimum Off-Time Effect on Switching Frequency t is 50ns, while t ON(MIN) OFF(MIN) constraints on the maximum/minimum FAN4603 can provide while maintaining a fixed switching frequency in PWM mode. When V is LOW, fixed switching is maintained as long ≤ − • ...
Page 11
... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 A 2. ...
Page 12
... Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.1 12 www.fairchildsemi.com ...