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| 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1464 is a versatile charge pump designed for use in battery operated power supply applications. A simple, low current charge pump doubler can be implemented without costly inductors or capacitors. Internal MOSFET's and control circuitry eliminate the need for costly board space and design time. The small device footprint allows for compact circuit design. The SC1464 charge pump can be used for applications that require up to 60mA of output current with VIN = 2.85V and VOUT = 5.2V. The small 8 lead MSOP-8 package helps minimize board space. The TF1 and TF2 pins provide binary control of the oscillator frequency to either 1 MHz, 260kHz, 32kHz or 8kHz. The user can change the frequency during operation with extremely fast settling time. FEATURES = Small size - MSOP-8 package = Typical efficiency of 90% @ full load = Designed to work with ceramic or tantalum = = = = = = = capacitors Soft start functionality Short-Circuit and Over-Temperature protection <55A input current @ no load (TF1=0;TF2=1) <330A input current @ no load (TF1=0;TF2=0) Oscillator frequency accurate to 5% Shutdown current < 1A All Specifications rated over the full temperature range (-40C to 85 C) APPLICATIONS = = = = Cellular phones Handheld devices PDA power supplies Peripheral card supplies ORDERING INFORMATION Part Number (1) Package MSOP-8 SC1464CMS.TR APPLICATION CIRCUIT U1 SC1464 7 Vin EN GND TF1 TF2 Note: (1) Only available in tape and reel packaging. A reel contains 2500 devices. Vin =3 V +/- 5% 4 1 2 Vo =5.2 V to 6.2 V Vo C+ C3 5 CBucket 6 Cout Logic Input or Vin Cin TF1 TF2 Iout 60mA 20mA 60mA 20mA Freq 260kHz 260kHz 1MHz 1MHz Cin 3.3uF 1.0uF 1.0uF 0.22uF 8 Cout 3.3uF 1.0uF 1.0uF 0.22uF CBucket 2.2uF 0.22uF 0.22uF 0.10uF 1 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 ABSOLUTE MAXIMUM RATINGS Parameter Input Supply Voltage Output Voltage VOUT Short-Circuit Duration Operating Ambient Temperature Range Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering) 10 Sec Thermal Temperature Junction to Ambient Thermal Impedance Junction to Case Symbol VIN VO SC TA TJ TSTG TLEAD JA JC Maximum -0.3 to +4 -0.3 to +8 Indefinite -40 to +85 -40 to +125 -65 to +150 300 185 47 C C C C C/W C/W Units V V ELECTRICAL CHARACTERISTICS Unless specified, TA = -40C to 85C, EN = VIN, CBucket = 2.2F(ESR = 0.1), CIN , COUT = 3.3F(ESR = 1), VIN = 3V5%, VOUT = 5.2V to 6.2V. Parameter Input Supply Voltage Input Supply Current Symbol VIN IIN Test Conditions MIN 2.5 TYP MAX 3.5 Units V A IO = 0 TF1 = 0, TF2 = 1, freq = 8kHz IO = 0 TF1 = 0, TF2 = 0, freq = 32kHz IO = 0 TF1 = 1, TF2 = 0, freq = 260kHz IO = 0 TF1 = 1, TF2 = 1, freq = 1MHz EN = GND 45 270 1.6 5.8 55 330 2 8 1 mA A Output Current IO VI = 2.85, TF1 = 0, TF2 = 1. freq = 8kHz VI = 2.85, TF1 = 0, TF2 = 0. freq = 32kHz VI = 2.85, TF1 = 1, TF2 = 0. freq = 260kHz VI = 2.85, TF1 = TF2 = 1. freq = 1MHz Cbucket = 220nF 5 20 60 45 2*VIN 170 150 85 7.82 30.18 8.50 32.80 9.18 35.42 V mA mV % kHz kHz kHz MHz mA Max. Output Voltage(3) Short Circuit Current Output Ripple (pk-pk) Power Efficiency Oscillator Frequency (1)(3) VOUT ISC VR OSC IO = 0 VO = 0 to VIN - 1V, IO = IIN IO = 60mA, Frequency = 260kHz IO = 60mA, TF1 = 1, TF2 = 0 TF1 = 0, TF2 = 1 TF1 = 0, TF2 = 0 TF1 = 1, TF2 = 0 TF1 = TF2 = 1 241.13 262.10 283.07 0.92 1.00 1.08 2 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 ELECTRICAL CHARACTERISTICS Unless specified, TA = -40C to 85C, EN = VIN, CBucket = 2.2F(ESR = 0.1), CIN , COUT = 3.3F(ESR = 1), VIN = 3V5%, VOUT = 5.2V to 6.2V. Parameter Time to Regulation at Turn-on(2)(3) Input High Threshold Input Low Threshold Inrush Current (3) Symbol tON Vih Vil IINRUSH O.T. O.T.H Test Conditions IO = 0 to 60 mA freq = 260kHz All input pins All input pins Upon application of VIN, Maximum average current over 10 periods MIN TYP 420 MAX 1000 Units s V 1.3 0.4 750 170 10 V mA C C Over Temperature protection(3) Over Temperature Hysteresis(3) NOTES: (1) All electrical characteristics are for the application circuit on page 2. (2) Soft start functionality is performed along with short circuit protection. If VOUT is less than VIN - 200mV, then all switches are turned off and VOUT is charged with a 70mA current source from VIN. When VOUT reaches VIN - 200mV, then a current limit version of the switches are turned on until VOUT reaches VIN + a PMOS threshold, at which point all switches are enabled. (3) Guaranteed by design. 3 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 BLOCK DIAGRAM Thermal Shut Down PIN CONFIGURATION Top View (MSOP-8) PIN DESCRIPTION Pin# 1 2 Pin Name TF1 TF2 0 TF2 0 1 3 4 5 6 7 8 VO EN C+ CVIN GND Voltage output Enable. Pull EN low to reduce the current on VIN to less than 1A. This pin should be connected to the positive terminal of the external charging capacitor. This pin should be connected to the negative terminal of the external charging capacitor. Supply voltage input. Ground. 4 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 Pin Function Binary frequency select pins. The frequency is set according to the following table. TF1 1 32kHz 260kHz 8kHz 1MHz 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 Eff vs Vo (260kHz) 7.500 7.000 6.500 SC1464 Vo vs Io (260kH z) 96.00% 94.00% Vo (V) 6.000 5.500 5.000 4.500 Eff (%) 92.00% 20 m a 40 m a 60 m a 90.00% 4.50 5.00 5.50 Vo (V) 6.00 6.50 7.00 4.000 3.500 Vin = 2.5 Vin = 3.0 Vin = 3.5 3.000 2.E-02 3.E-02 3.E-02 4.E-02 4.E-02 5.E-02 5.E-02 6.E-02 6.E-02 Io (A ) Eff vs Vin (260kHz) 140.0E-3 Iinvs Vin(260kH z) 96.00% 120.0E-3 100.0E-3 94.00% Eff (%) Iin (A) 80.0E-3 60.0E-3 40.0E-3 92.00% 60m a 90.00% 2.50 20.0E-3 000.0E+0 2.45 20m a 40m a 60m a 2.70 2.90 V (V) in 3.10 3.30 3.50 2.65 2.85 3.05 V (V in ) 3.25 3.45 3.65 IinvsIo(260kH z) 140.0E-3 120.0E-3 100.0E-3 Iin (A) Eff (%) 95.50% 95.00% 94.50% 94.00% 93.50% Eff vs Io (260kH z) 80.0E-3 60.0E-3 Vin =2.5 40.0E-3 20.0E-3 000.0E+0 1.E-02 V = 2.5 in 93.00% Vin =3 Vin =3.5 V = 3.0 in 92.50% 92.00% 10.0E-3 V =3.5 in 20.0E-3 30.0E-3 40.0E-3 Io(A ) 50.0E-3 60.0E-3 70.0E-3 2.E -02 3.E-02 4.E-02 Io(A ) 5.E-02 6.E -02 7.E-02 5 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 Vo vs Vin (260kHz) 7.000 6.500 6.000 Vo (V) 5.500 5.000 4.500 4.000 2.50 SC1464 20 m a 40 m a 60 m a 2.70 2.90 Vin (V) 3.10 3.30 3.50 6 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 Iin vs Ta (8kHz) @ Io = 0mA 7.5E-3 SC1464 Iin vs Ta (1MHz) @ Io = 0mA 60.0E-6 55.0E-6 7.0E-3 6.5E-3 50.0E-6 Iin (A) 45.0E-6 40.0E-6 Vin = 3.5 Iin (A) Vin = 3 6.0E-3 5.5E-3 5.0E-3 Vin = 3.5 35.0E-6 30.0E-6 25.0E-6 -40 -20 0 20 40 60 80 100 Ta (Deg. C.) Vin = 2.5 4.5E-3 4.0E-3 -40 -20 0 20 40 60 Ta (Deg. C.) Vin = 3 Vin = 2.5 80 100 Iin vs Ta (32kHz) @ Io = 0mA 320.0E-6 300.0E-6 280.0E-6 Iin (A) 260.0E-6 240.0E-6 220.0E-6 Vin = 3.5 200.0E-6 180.0E-6 -40 -20 0 20 40 60 Ta (Deg. C.) Vin = 3 Vin = 2.5 80 100 Iin vs Ta (260kHz) @ Io = 0mA 2.3E-3 2.1E-3 1.9E-3 1.7E-3 1.5E-3 1.3E-3 1.1E-3 900.0E-6 -40 -20 0 20 40 60 80 100 Ta (Deg. C.) Iin (A) Vin = 3.5 Vin = 3 Vin = 2.5 7 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 Vo vs Ta (8Khz) @ Vin = 3.00 V 6.2 SC1464 Vo vs Ta (1Mhz) @ Vin = 3.00 V 6.2 0 ma 6.15 1 ma 6.1 6.1 6.05 Vo (V) 6 5.95 5.9 5.85 5.8 -40.00 2 ma 6 5.9 5.8 5.7 0 ma Vo (V) 5.6 5.5 -40.00 20 ma 40 ma 60 ma -20.00 0.00 20.00 40.00 60.00 80.00 100.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 Ta (Deg. C.) Ta (Deg. C.) Vo vs Ta (32Khz) @ Vin = 3.00 V 6.1 6 5.9 Vo (V) 5.8 5.7 0 ma 5.6 5.5 -40.00 1 ma 2 ma -20.00 0.00 20.00 40.00 60.00 80.00 100.00 Ta (Deg. C.) Vo vs Ta (260Khz) @ Vin = 3.00 V 6.2 6.1 6 5.9 5.8 5.7 5.6 5.5 -40.00 Vo (V) 0 ma 20 ma 40 ma 60 ma -20.00 0.00 20.00 40.00 60.00 80.00 100.00 Ta (Deg. C.) 8 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 Eff vs Io (260kHz) @Vin =3.00V 95.80% 95.60% 95.40% 95.20% Eff (%) 95.00% 94.80% 94.60% 94.40% 94.20% 94.00% 1.50E-02 Ta = 25 Deg. C. Ta = -40 Deg. C. Ta = 85 Deg. C. SC1464 2.50E-02 3.50E-02 4.50E-02 5.50E-02 6.50E-02 Io (A) Eff vs Ta @Vin =3.00 V, Io = 1 m a 98.00% 96.00% 94.00% 92.00% Eff (%) 90.00% 88.00% 86.00% 84.00% 82.00% -40.00 F = 8 khz F = 32khz -20.00 0.00 20.00 40.00 60.00 80.00 100.00 Ta (Deg. C.) Eff vs Ta @Vin =3.00 V, Io = 2 m a 100.00% 98.00% 96.00% 94.00% Eff (%) 92.00% 90.00% 88.00% 86.00% 84.00% 82.00% -40.00 F = 8 khz F = 32khz -20.00 0.00 20.00 40.00 60.00 80.00 100.00 Ta (Deg. C.) 9 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER PRELIMINARY - August 11, 2000 SC1464 OUTLINE DRAWING - MSOP-8 LAND PATTERN - MSOP-8 ECN 00-1246 10 (c) 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 |
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