SC1461ISKTR

Multi Mode Capless ChargeTM Pump POWER MANAGEMENT Description The SC1461 is a versatile charge pump designed for use in battery operated power supply applications. A simple, low current boost circuit can be implemented without costly inductors or capacitors. Internal MOSFETs and control circuitry eliminate the need for costly board space and design time. The small device footprint allows for compact circuit design. The SC1461 is a CaplessTM charge pump for applications that require up to 8mA of output current. Three modes of output voltage can be programmed via the ADJ pin. Modes include: VO = (1.32*VIN) ± 4% @ 7mA of output current VO = (1.515 * VIN) ± 4% @ 4mA of output current and the adjustable mode where an external resistor divider determines the output voltage. The SC1461 is packaged in a 5 lead SOT-23 package. SC1461 Features K K K K Small size - 5 pin SOT-23 package 4% voltage accuracy 65uA typ. quiescent current User selectable output voltages of 1.515* VIN, 1.32 * VIN, or adjustable output K All specifications rated over full temperature range (-40°C to 85°C) Applications K K K K K PDA Power Supplies Notebook Power Supplies Peripheral Card Supplies Industrial Power Supplies High Density DC/DC Conversion Typical Application Circuit R1   Vo = 1.03 × Vin × 1 +   R1 + R2  Vin = 3.3V SC1461 Vo = 5.0V Vin = 2.5V SC1461 Vo = 3.3V Vo SC1461 Vin 5 4 5 4 4 Disable Vin Disable Vin Cin 0.22uF Cout 47nF Cin 0.22uF Cout 47nF Cout 47nF Disable Vin Vo Vo Vo 5 R1 Cin 0.22uF GND GND Vin 1 2 3 1 2 3 3 2 GND ADJ ADJ ADJ   R2  Revision 1, December 2000 1 1 www.semtech.com SC1461 POWER MANAGEMENT Absolute Maximum Ratings Parameter Supply Voltage Output Voltage Thermal Resistance Junction to Ambient Operating Temperature Temperature Range Storage Temperature Lead Temperature (Soldering) 10 Seconds Symbol VIN VO θJA TA TJ TSTG TL Maximum -0.3 to +4 -0.3 to +6 410 -40 to +85 -40 to +125 -65 to 150 300 Units V V °C/W °C °C °C °C Electrical Characteristics Unless specified: 2.25V ≤ Vin ≤ 3.63V, 0 ≤ Io ≤ 8mA, Cin = 0.22uF, Cout = 47nF, Ta = -40 to 85 °C Parameter Input Supply Voltage Input Supply Current Symbol VIN IIN Conditions ADJ, DISABLE = GND, IO = 0mA, VIN = 3.3V ADJ = GND, DISABLE = VIN IO = 0mA, VIN = 3.3V Min 2.25 Typ 65 0.1 Max 3.63 100 1 4 4 Units V µA Output Voltage Output Ripple (pk-pk)(1) Output Current Efficiency(1) Oscillator Frequency(2) Time to Regulation at Turn-On(1) Disable Threshold Voltage Disable current VO VR IO η OSC tON DISHI DISLO IDISABLE ADJ, DISABLE = GND, IO ≤ 4mA ADJ = VIN , DISABLE = GND, IO ≤ 7mA ADJ = VIN , DISABLE = GND, IO ≤ 7mA ADJ = VIN = 2.5V, DISABLE = GND ADJ, DISABLE = GND,VIN = 3.3V ADJ = VIN = 2.5V, DISABLE = GND IO = 7mA ADJ = VIN = 2.5V, DISABLE = GND ADJ, DISABLE = GND,VIN = 3.3V ADJ = VIN = 2.5V, DISABLE = GND IO = 7mA, COUT = 47nF -4 -4 7 4 1.515 X VIN 1.32 x VIN 50 8 7 50 12 13.5 25 1 % mV mA mA % MHz µs 1.3 10 V V µA .5 Disable = 0V 0.9 1 NOTES: (1) All electrical characteristics are for the application circuit on page 1. (2) Guaranteed by design. (3) This device is ESD sensitive. Use of standard ESD handling precautions is required.  2000 Semtech Corp. 2 www.semtech.com SC1461 POWER MANAGEMENT Pin Configuration (Top View) Ordering Information Device (1) SC1461ISKTR SC1461EVB Package 5-SOT-23 Evaluation Board Note: (1) Only available in tape and reel packaging. A reel contains 3000 devices. 5 Lead SOT-23 Pin Descriptions Pin # 1 2 Pin Name DISABLE GND Pin Function Disable pin is internally pulled to VIN resulting in standby mode and the output will be disabled. Grounding this pin will enable the output. Ground. Mode selection pin. Grounding this pin will yield Vo = 1.515*Vin. Pulling this pin to VIN will yield VO = 1.32*VIN. An external voltage divider connected at VIN will achieve: 3 ADJ R1   Vo = 1.03 × Vin ×  1 +  R1 + R 2   See Applications Circuits. 4 5 VO VIN Voltage output. Supply voltage input. Block Diagram Marking Information Top Mark 1461 BottomMark yyww yyww = Datecode (Example: 9908)  2000 Semtech Corp. 3 www.semtech.com SC1461 POWER MANAGEMENT Typical Characteristics Vou t Vs Iou t (1.32 Mo de, Vin = 2.25V ) 3.2 00 3.1 00 4.5 00 3.0 00 4.3 00 4.7 00 Vo ut Vs Io u t (1. 32 Mo de, V in = 3 .3V) Vout (V) Vout (V) +4% 25°C - 40°C 85°C -4% 2. 0E-3 4. 0E-3 Io u t (A) 2.9 00 2.8 00 2.7 00 2.6 00 2.5 00 0 00. 0E+0 4.1 00 3.9 00 3.7 00 3.5 00 +4% 25°C - 40°C 85°C -4% 2.0 E-3 4.0 E-3 I o u t (A) 6. 0E-3 8. 0E-3 0 00. 0E+0 6.0 E-3 8.0 E-3 Typical Vout vs Iout 1.32 Mode Vin = 2.25V Vo ut Vs Io u t (1. 32 Mo de, V in = 2 .5V ) 3.5 00 3.4 00 3.3 00 3.2 00 5.1 00 4.9 00 4.7 00 4.5 00 Vo ut ( V) Typical Vout vs Iout 1.32 Mode Vin = 3.30V Vo ut Vs Io ut (1 .3 2 M od e, Vin = 3.6 3V ) Vout (V) 3.1 00 3.0 00 2.9 00 2.8 00 2.7 00 2.6 00 2.5 00 0 00. 0E+0 2.0 E-3 4.0 E-3 I o u t (A) 4.3 00 4.1 00 3.9 00 3.7 00 3.5 00 0 00. 0E+0 2. 0E-3 4. 0E-3 Io ut ( A) +4% 25°C - 40°C 85°C -4% 6.0 E-3 8.0 E-3 +4% 25°C - 40°C 85°C -4% 6. 0E-3 8. 0E-3 Typical Vout vs Iout 1.32 Mode Vin = 2.50V Typical Vout vs Iout 1.32 Mode Vin = 3.63V  2000 Semtech Corp. 4 www.semtech.com SC1461 POWER MANAGEMENT Typical Characteristics Vo ut Vs Io ut (1.515 Mo de , V in = 2.25V) 3.7 00 5.3 00 3.5 00 3.3 00 Vo ut ( V) V ou t Vs Iou t (1.515 Mode, Vin = 3 .3V) 5.1 00 4.9 00 4.7 00 Vout (V) 3.1 00 +4% 2.9 00 25°C - 40°C 2.7 00 2.5 00 0 00. 0E+0 2. 0E-3 4. 0E-3 Io ut ( A) 4.5 00 4.3 00 4.1 00 3.9 00 3.7 00 3.5 00 +4% 25°C - 40°C 85°C -4% 2. 0E-3 4. 0E-3 Io u t (A) 85°C -4% 6. 0E-3 8. 0E-3 0 00. 0E+0 6. 0E-3 8. 0E-3 Typical Vout vs Iout 1.515 Mode Vin = 2.25V Vou t Vs Iou t (1.515 Mode, Vin = 2 .5V ) 4.1 00 3.9 00 3.7 00 Typical Vout vs Iout 1.515 Mode Vin = 3.30V V o ut V s Iout (1 .5 15 Mo de , V in = 3.63 V ) 6.0 00 5.5 00 Vout (V) 3.3 00 3.1 00 2.9 00 2.7 00 2.5 00 0 00. 0E+0 +4% 25°C - 40°C 85°C - 4% 2. 0E-3 4. 0E-3 Io u t (A) V o ut ( V) 3.5 00 5.0 00 4.5 00 +4% 25°C - 40°C 85°C -4% 4.0 00 6. 0E-3 8. 0E-3 3.5 00 0 00. 0E+0 2.0 E-3 4.0 E-3 Io ut ( A) 6.0 E-3 8.0 E-3 Typical Vout vs Iout 1.515 Mode Vin = 2.50V Typical Vout vs Iout 1.515 Mode Vin = 3.63V  2000 Semtech Corp. 5 www.semtech.com SC1461 POWER MANAGEMENT Typical Characteristics Vout V s Iout ( 1.4 2 Ad ju st Mo de , V in = 2.25V) 3.4 00 3.3 00 3.2 00 3.1 00 5.1 00 4.9 00 4.7 00 Vo ut Vs Io ut (1.42 Adju st Mode, Vin = 3 .3V ) Vout (V) 3.0 00 2.9 00 2.8 00 2.7 00 2.6 00 2.5 00 0 00. 0E+0 2. 0E-3 4. 0E-3 Io u t (A) Vout (V) 4.5 00 4.3 00 4.1 00 3.9 00 3.7 00 3.5 00 +4% 25°C - 40°C 85°C -4% 2. 0E-3 4. 0E-3 Io u t (A) +4% 25°C - 40°C 85°C -4% 6. 0E-3 8. 0E-3 0 00. 0E+0 6. 0E-3 8. 0E-3 Typical Vout vs Iout Adjust Mode = 1.42 * Vin Vin = 2.25V Vout V s Iout (1 .42 Ad ju st Mo de, V in = 2 .5V) Typical Vout vs Iout Adjust Mode = 1.42 * Vin Vin = 3.30V Vo ut Vs Io ut (1 .4 2 A djust Mode, Vin = 3.63V) 5.5 00 5.3 00 5.1 00 4.9 00 3.9 00 3.7 00 3.5 00 Vout (V) 3.3 00 3.1 00 2.9 00 2.7 00 2.5 00 0 00. 0E+0 V out (V) +4% 25°C - 40°C 85°C -4% 2.0 E-3 4.0 E-3 I o u t (A) 4.7 00 4.5 00 4.3 00 4.1 00 3.9 00 3.7 00 +4% 25°C - 40°C 85°C -4% 2. 0E-3 4. 0E-3 Io u t (A) 6.0 E-3 8.0 E-3 3.5 00 0 00. 0E+0 6. 0E-3 8. 0E-3 Typical Vout vs Iout Adjust Mode = 1.42 * Vin Vin = 2.50V Typical Vout vs Iout Adjust Mode = 1.42 * Vin Vin = 3.63V  2000 Semtech Corp. 6 www.semtech.com SC1461 POWER MANAGEMENT Typical Characteristics I in v s V in ( Io ut = 0 m A , T a = 2 5 ° C ) I in v s V i n ( Io ut = 0 m A , T a = - 4 0 ° C ) 0 . 0 60 0 . 0 50 0 . 0 40 Iin (m A ) 0.030 0.020 0.010 0.000 2.25 2.75 V in ( V ) 1 . 5 1 5 M o de 1 . 3 2 M od e 0 . 0 50 0 . 0 45 0 . 0 40 0.035 Iin ( m A ) 0.030 0.025 0.020 0.015 0.010 0.005 0.000 3.25 2.25 2.75 V in ( V ) 1 . 5 1 5 M o de 1 . 3 2 M od e 3.25 Typical Iin vs Vin Iout = 0mA Ta = 25°C Iin v s V in (I o ut = 0 m A , T a = 8 5 ° C ) Typical Iin vs Vin Iout = 0mA Ta = -40°C 0 . 0 60 0 . 0 50 0 . 0 40 Iin ( m A ) 0.030 0.020 0.010 0.000 2.25 2.75 V in ( V ) 1 . 5 1 5 M o de 1 . 3 2 M od e 3.25 Typical Iin vs Vin Iout = 0mA Ta = 85°C  2000 Semtech Corp. 7 www.semtech.com SC1461 POWER MANAGEMENT Outline Drawing - SOT-23-5L Land Pattern - SOT-23-5L Contact Information Semtech Corporation Power Management Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804  2000 Semtech Corp. 8 www.semtech.com