CIRCUIT DESIGN AND EXPERIMENTAL RESULTS: SIMO BUCK

Transcription

1 CIRCUIT DESIGN AND EXPERIMENTAL RESULTS: SIMO BUCK!"#$%&'()*+',-$./$01('1$ 39! ' Inductor current time-sharing among the M output branches ' Two main-switches MP and MN ' M load-switches SW i (SW i, i = 1,, M) ' M control loops and error signals " i " i = (V set,i V out,i ) ' Inductor #CCM ' Outputs #DCM M. Belloni, E. Bonizzoni, E. Kiseliovas, P. Malcovati, F. Maloberti, T. Peltola, T. Teppo: "A 4-Output Single-Inductor DC-DC Buck Converter with Self-Boosted Switch Drivers and 1.2A Total Output Current ISSCC 2008.!!"#$%&'()*+',-$./$01('1$ 40!

2 ' If #(" 1 +" 2 +" 3 +" 4 )>0 ( The whole system needs more energy ( X 1 (main) should increase ' If #(" 1 +" 2 +" 3 +" 4 )<0 ( The whole system needs less energy ( X 1 should decrease!"#$%&'()*+',-$./$01('1$ 41! ' If #" 1 -#(" 2 +" 3 +" 4 )>0 ( The first channel needs more energy ( X 2 (load1) should increase ' If #" 1 -#(" 2 +" 3 +" 4 )<0 ( The first channel needs less energy ( X 2 should decrease!"#$%&'()*+',-$./$01('1$ 42!

3 ' H(s) #First-order zero-pole filter ' A #Gain!"#$%&'()*+',-$./$01('1$ 43!! Analog Processing!"#$%&'()*+',-$./$01('1$ 44!

4 ' 0.5!m CMOS Technology ' 5 Metal Levels ' 2 Poly Levels ' Active area 3.5mm x 3.8mm!"#$%&'()*+',-$./$01('1$ 45! Hanh-Phuc Le et Al. ISSCC07 Young-Jin Woo et Al. ISSCC08 Kyoung-Sik Seol et Al. ISSCC09 Outputs Converter Topology Boost Boost Buck-Boost Supply Voltage [V] 2.5# # #5 2.5#4.5 Output Voltages [V] (4-Outputs) 5# 12 (1-Outputs) -12# #4 0#(V supply -0.5) (3-Outputs) 2# 9.5 (1-Outputs) 6# 10 (1-Outputs) 8# 12 Inductor [!H] Output Capacitor [!F] Switching Frequency [MHz] Total Output Current [A] 0#0.11 0#0.1 0#0.145 Single Output Currents [A] 0 #0.04 0#0.1 0 #0.05 Peak Power Efficiency 80.8% 80% 83%!"#$%&'()*+',-$./$01('1$ 46!

5 Cross Regulation!!"#$%&'()*+',-$./$01('1$ 47!!"#$%&'()*+',-$./$01('1$ 48!! Self boost snubber

6 !"#$%&'()*+',-$./$01('1$ 49!!"#$%&'()*+',-$./$01('1$ 50!

7 CIRCUIT DESIGN AND EXPERIMENTAL RESULTS: HIGH SWITCHING FREQUENCY!"#$%&'()*+',-$./$01('1$ 51! ( A control based on a Voltage-To-Pulse (V2P) converter avoids the Op-Amp and comparator use: M. Belloni, E. Bonizzoni, F. Maloberti: $ Very low quiescent current "High Efficiency DC-DC Buck Converter $ Circuit area reduction with 60/120-MHz Switching Frequency and 1-A Output Current"; ESSCIRC 2009, pp !!"#$%&'()*+',-$./$01('1$ 52!

8 ( The delay time between the CLOCK rising-edge and the OUT PULSES rising-edge depends on V error : ( Avoid inverter stages shootthrough currents to decrease the dynamic power consumption.!"#$%&'()*+',-$./$01('1$ 53!!"#$%&'()*+',-$./$01('1$ 54!

9 ( 0.18!m gate length CMOS process with 5-metals and 2-poly ( 1.2 mm x 0.76 mm active area ( mm2 used for the current-mode and V2P control!"#$%&'()*+',-$./$01('1$ 55!!"#$%&'()*+',-$./$01('1$ 56!

10 Power Efficiency [%]!"#$%&'()*+',-$./$01('1$ 57! Supply Voltage 2.2V#2.8V Output Voltage 0.5V# (V dd -0.2V) Output Current 0#1A Nominal Switching Frequency 60MHz Maximum Switching Frequency 120MHz Inductor 36nH 120MHz) Output Capacitor 4.7!F Max Output Voltage Ripple 10mV Peak Power 60MHz 93% Peak Power 120MHz 88% Max Line regulation 10mV/V Load 60MHz 20mV/V Load 120MHz 25mV/V!"#$%&'()*+',-$./$01('1$ 58!

11 CONCLUSIONS!"#$%&'()*+',-$./$01('1$ 59!! Power Management for Portable systems enables: " High efficiency " Miniature solutions (all in package) " Multiple output single inductor! Power Management for Microsystems " Is an emerging discipline " Will benefit from existing knowledge # Digital # SiP # Power management for Autonomous Systems!"#$%&'()*+',-$./$01('1$ 60!

12 Thank you!!!!!"#$%&'()*+',-$./$01('1$ 61! REFERENCES S.K. Hoon, N. Culp, J. Chen, F. Maloberti: "A PWM Dual-Output DC/DC Boost Converter in a 0.13µm CMOS Technology for Cellular-Phone Backlight Application"; Proc. of the 31st European Solid-State Circuits Conf., ESSCIRC 2005, Grenoble, September 2005, pp E. Bonizzoni, F. Borghetti, P. Malcovati, F. Maloberti, B. Niessen: "A 200mA 93% Peak Efficiency Single-Inductor Dual-Output DC-DC Buck Converter"; IEEE Int. Solid-State Circuits Conf. - Digest of Technical Papers, ISSCC 2007, San Francisco, February 2007, pp M. Belloni, E. Bonizzoni, E. Kiseliovas, P. Malcovati, F. Maloberti, T. Peltola, T. Teppo: "A 4- Output Single-Inductor DC-DC Buck Converter with Self-Boosted Switch Drivers and 1.2A Total Output Current"; IEEE Int. Solid-State Circuits Conf. - Digest of Technical Papers, ISSCC 2008, San Francisco, 3-7 February 2008, pp M. Belloni, E. Bonizzoni, F. Maloberti: "High Efficiency DC-DC Buck Converter with 60/120- MHz Switching Frequency and 1-A Output Current"; 35th European Solid-State Circuits Conference, ESSCIRC 2009, Athens, September 2009, pp E. Bordeaux: Portable Power Management: A Holistic Perspective ; Intersil Corp., Technical white paper. Linear Technology: Power Management for Portable Products High Performance Analog Ics, !"#$%&'()*+',-$./$01('1$ 62!

13 Portable Design in 2009 ; Portable Design, January 2009, RTC Group Publications. S. Dearborn: Power Management in Portable Applications: Charging Lithium-Ion/Lithium- Polymer Batteries ; Microchip Technology inc., 2004, White paper AN947. M. Davidson: Understanding Portable Applications Requirements to Improve System Performance ; Power Designer, No J. Falin: Designing DC/DC Converters Based on SEPIC Topology ; Analog Applications Journal, Texas Instruments Inc., 4Q O. Trescases, W. Tung Ng, H. Nishio. M. Edo, T. Kawashima: A Digitally Controlled DC-DC Converter Module with a Segmented Output Stage for optimized Efficiency ; Proc. of the 18 th Int. Symposium on Power Semiconductor Devices & IC s, ISPSD 2006, Naples, 4-8 June 2006, pp A. Yoo, M. Chang, O. Trescases, W. Tung Ng: High Performance Low-Voltage Power MOSFETs with Hybrid Waffle Layout Structure in a 0.25µ Standard CMOS Process ; Proc. of the 20th International Power Semiconductor Devices and IC's, ISPSD 2008, Orlando, May 2008, pp J.A. Paradiso, T. Starner: Energy scavenging for mobile and wireless electronics ; IEEE Pervasive Computing, Jan.-Mar. 2005, Vol. 4, No. 1, pp !"#$%&'()*+',-$./$01('1$ 63!