Series DC-DC Converter Application ower Source of ortable roducts almtops ortable Cameras and Video Recorders Wireless mouse and keyboard Ordering Information Features Small number of external components: inductor, diode and capacitor. Ultra low input current : Typical 6uA Output Voltage Accuracy : +/- 2.5 % Low ripple and noise Low startup voltage : ax 0.9V (with 1mA input) High Efficiency: Typical 80% ackage Available: SOT- 89 (500mW), SOT-23 (150mW) & TO - 92 (300mW) Designator a b c d e Description Version Output Voltage eg. 30=3.0V 33=3.3V 50=5.0V ackage Type = SOT-89 = SOT-23 T = TO-92 Device Orientation R = Embossed Tape (Orientation of Device : Right) L = Embossed Tape (Orientation of Device : Left) B = Bag (TO-92) G = Lead Free art General Description The is a group of F Step-up DC/DC converter IC with ultra-low supply current by COS process. It consists of an oscillator, a F control circuit, a Lx switch driver transistor, a reference voltage unit, an error amplifier for voltage detection and an Lx switch protection circuit. It is suitable for use with battery-powered instruments with low noise and ultra low supply current. Version A B C D E F ackage Designator T T ackage SOT23-3 SOT89-3 TO-92 SOT23-3 SOT89-3 TO-92 SOT23-5 SOT89-5 SOT23-5 SOT89-5 SOT23-5 SOT89-5 SOT23-5 SOT89-5 Switching Build-in External Build-in External Build-in Build-in CE VDD in FB in Features No No No Lx No No No Ext Yes No No Lx+CE Yes No No Ext+CE No Yes No Lx+VDD No Yes Yes FB 1/10 Rev. B, June 2006
arking: SOT23: L63A series L63C Series arking A30RG 7BXX A33RG 77XX A36RG 74XX A45RG 7KXX A50RG 70XX arking C30RG 7EXX C33RG 7AXX C36RG 7HXX C45RG 7SXX C50RG 73XX Description XX = roduction Date Code e.g. B2 Description XX = roduction Date Code e.g. B2 L63D Series arking Description D30RG 76XX XX = roduction Date D33RG 7FXX Code D50RG 75XX e 7BB2 SOT89: L63A and L63B Series Designator 1, 2 3, 4 5, 6 Description Year Code e.g. 05 = Year 2005 Week Code e.g. 30 = Week 30 Output Voltage e.g. 30 = 3.0 V
A in Configuration ackage in Number SOT23-3 SOT89-3 TO-92 in Name 1 1 1 V SS Ground 3 2 2 V OUT Output Voltage monitor, Internal IC ower Supply 2 3 3 L X Switch 2/10 Rev. B, June 2006
B in Configuration ackage in Number SOT23-3 SOT89-3 TO-92 in Name 1 1 1 V SS Ground 3 2 2 V OUT Output Voltage monitor, Internal IC ower Supply 2 3 3 EXT External Switch Drive 3/10 Rev. B, June 2006
C in Configuration ackage in Number SOT23-5 SOT89-5 in Name 4 5 V SS Ground 2 2 V OUT Output Voltage monitor, Internal IC ower Supply 5 4 Lx Switch 1 3 CE Chip Enable 3 1 NC NC 4/10 Rev. B, June 2006
D in Configuration ackage in Number SOT23-5 SOT89-5 in Name 4 5 V SS Ground 2 2 V OUT Output Voltage monitor, Internal IC ower Supply 5 4 EXT External Switch Drive 1 3 CE Chip Enable 3 1 NC NC 5/10 Rev. B, June 2006
E in Configuration ackage in Number SOT23-5 SOT89-5 in Name 4 5 V SS Ground 2 2 V DD ower Supply 5 4 Lx Switch 1 3 V OUT Output Voltage onitor 3 1 NC NC 6/10 Rev. B, June 2006
F in Configuration ackage in Number SOT23-5 SOT89-5 in Name 4 5 V SS Ground 2 2 V OUT ower Supply 5 4 Lx Switch 1 3 FB Feedback 3 1 NC NC 7/10 Rev. B, June 2006
Absolute aximum Ratings arameter Symbol Ratings Units Input Voltage V IN 12 V V DD Input Voltage V DD 12 V Lx in Voltage V LX 12 V EXT in Voltage V EXT -0.3 ~ V OUT + 0.3 V CE in Voltage VCE -0.3 ~ V OUT + 0.3 V Lx in Current I LX 600 ma EXT in Current I EXT + 30 ma Continuous SOT-89 500 Total ower TO-92 d 300 mw Dissipation SOT-23 150 Operating Ambient Temperature Topr -25 ~ +85 Storage Temperature Tstg -40 ~ +125 o C o C Electrical Characteristics V IN = V OUT * 0.6, V SS = 0V, I OUT = 10mA, T a = 25 o C, unless otherwise specified. arameter Symbol Conditions in Typ ax Units Output Voltage V OUT Vout * Vout * Vout 0.975 1.025 V Input Voltage V IN 8 V No Load Input Current I IN I OUT = 0mA 4.6 9.3 ua Startup Voltage V START I OUT = 1mA, V IN : 0 2V 0.8 0.9 V Hold-on Voltage V HOLD I OUT = 1mA, V IN : 2 0V 0.7 V Supply Current 1 I DD1 No external component, V IN = V OUT * 0.95 8 12 ua Supply Current 2 I DD2 V IN = V IN + 0.5V 6 ua Lx Switching Current I LX V LX = 0.4V, V IN = V OUT * 0.95 100 160 ma Lx Leakage Current I LXLEAK V IN =V LX =6.0V 0.5 ua EXT High On Resistance R EXTH No external component, V IN = V OUT * 0.95, 140 210 Ω V EXT = V OUT 0.4V EXT Low On Resistance R EXTL No external component, V IN = V OUT * 0.95, V EXT = 0.4V 140 210 Ω CE High Voltage V CEH V IN = V OUT * 0.95 0.9 V CE Low Voltage V CEL V IN = V OUT * 0.95 0.3 V CE High Current I CEH V OUT = 6.0V, V CE = 6.0V -0.5 0.5 ua CE Low Current I CEL V OUT = 6.0V, V CE = 0.0V -0.5 0.5 ua Oscillator Frequency F OSC 100 150 KHz Duty Cycle AXDTY 75 % Efficiency EFF 80 % Note : 1. Schokkty diode: 1N5817 or 1N5819 (forward voltage drop : 0.2V) 2. Inductor : 47uH (ESR < 0.5Ω) 3. Capacitor : Tantalum type, 47 uf 8/10 Rev. B, June 2006
Electrical Characteristics V IN = 1.6V, I OUT = 10mA, Ta = 25 o C, unless otherwise provided. A27 V OUT = 2.7V arameter Symbol Conditions in Typ ax Units Output Voltage V OUT 2.633 2.700 2.767 V Input Voltage V IN 8 V No Load Input Current I IN1 I OUT = 0mA 4.6 9.3 ua Startup Voltage V START I OUT = 1mA 0.8 0.9 V Hold-on Voltage V HOLD I OUT = 1mA 0.7 V Supply Current 1 I DD1 V IN = 2.57V 8 12 ua Supply Current 2 I DD2 V IN = 2.75V 6 ua Lx Switching Current I LX V LX=0.4V, V IN=2.57V 100 160 ma Lx Leakage Current I LXLEAK V IN=6.0V, V LX=6.0V 0.5 ua Oscillator Frequency F OSC 100 150 KHz Oscillator Duty Cycle AXDTY 75 % Efficiency EFF 80 % V IN = 1.8V, I OUT = 10mA, Ta = 25 o C, unless otherwise provided. A30 V OUT = 3.0V arameter Symbol Conditions in Typ ax Units Output Voltage V OUT 2.925 3.000 3.075 V Input Voltage V IN 8 V No Load Input Current I IN1 I OUT = 0mA 4.6 9.3 ua Startup Voltage V START I OUT = 1mA 0.8 0.9 V Hold-on Voltage V HOLD I OUT = 1mA 0.7 V Supply Current 1 I DD1 V IN = 2.85V 8 12 ua Supply Current 2 I DD2 V IN = 3.05V 6 ua Lx Switching Current I LX V LX=0.4V, V IN=2.85V 100 160 ma Lx Leakage Current I LXLEAK V IN=6.0V, V LX=6.0V 0.5 ua Oscillator Frequency F OSC 100 150 KHz Oscillator Duty Cycle AXDTY 75 % Efficiency EFF 80 % V IN = 2.0V, I OUT = 10mA, Ta = 25 o C, unless otherwise provided. A33 V OUT = 3.3V arameter Symbol Conditions in Typ ax Units Output Voltage V OUT 3.218 3.300 3.383 V Input Voltage V IN 8 V No Load Input Current I IN1 I OUT = 0mA 4.6 9.3 ua Startup Voltage V START I OUT = 1mA 0.8 0.9 V Hold-on Voltage V HOLD I OUT = 1mA 0.7 V Supply Current 1 I DD1 V IN = 3.135V 8 12 ua Supply Current 2 I DD2 V IN = 3.35V 6 ua Lx Switching Current I LX V LX=0.4V, V IN=3.135V 100 160 ma Lx Leakage Current I LXLEAK V IN=6.0V, V LX=6.0V 0.5 ua Oscillator Frequency F OSC 100 150 KHz Oscillator Duty Cycle AXDTY 75 % Efficiency EFF 80 % V IN = 3.0V, I OUT = 10mA, Ta = 25 o C, unless otherwise provided. A50 V OUT = 5.0V arameter Symbol Conditions in Typ ax Units Output Voltage V OUT 4.875 5.000 5.125 V Input Voltage V IN 8 V No Load Input Current I IN1 I OUT = 0mA 4.6 9.3 ua Startup Voltage V START I OUT = 1mA 0.8 0.9 V Hold-on Voltage V HOLD I OUT = 1mA 0.7 V Supply Current 1 I DD1 V IN = 4.75V 8 12 ua Supply Current 2 I DD2 V IN = 5.05V 6 ua Lx Switching Current I LX V LX=0.4V, V IN= 4.75V 100 160 ma Lx Leakage Current I LXLEAK V IN=6.0V, V LX=6.0V 0.5 ua Oscillator Frequency F OSC 100 150 KHz Oscillator Duty Cycle AXDTY 75 % Efficiency EFF 80 % 9/10 Rev. B, June 2006
Application Notes 1. It is recommended to use capacitor with a capacity of 10uF or more for good frequency characteristics, otherwise it will lead to high output ripple. Tantalum type capacitor is recommended. As there may be the case where a spike-shaped high voltage is generated by the inductor when Lx transistor is turned off, the operating voltage of capacitor should be at least three times of the output set voltage so as to avoid over-voltage damage. 2. It is recommended to use inductor has sufficiently small d.c. resistance, large allowable current and hardly reaches magnetic saturation. When the inductance of inductor is small, there may be the case that the inductor current exceeds the absolute maximum ratings at the maximum load condition. 3. It is recommended to place external components as close as possible to the DC/DC converter so as to minimize the interconnection parasitic between components and DC/DC converter, especially for the capacitor connected to V OUT pin. It is recommended to place 0.1uF ceramic capacitor between V OUT pin and V SS pin. 4. It is recommended to provide sufficient grounding for V SS pin. This will help to stable the zero level within DC/DC converter induced by the switching current level variation during operation. And the insufficient grounding may result in unstable operation of DC/DC converter. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. 10/10 Rev. B, June 2006