Cellular Telephones Power Management and Signal Conditioning InfoCard 19 DC INPUT CC/CV BATTERY CHARGER OPTIONAL* STEP-UP CONVERTER LT1619 LTC1872 LT1571-5 LTC1730 LTC1731 LOW NOISE LDO REGULATOR LT1761 XMTR PWR LOW NOISE LDO REGULATOR LT1761 RCVR PWR LOW NOISE LDO REGULATOR LT1761 ON/OFF BASEBAND PWR 1 2 3 4 5 6 7 8 9 * 0 # LTC1503 LTC1701 LTC1878 PA LCD DISPLAY LED BACKLIGHT LTC1682 LTC1751-5 LTC1754-5 GAIN VBATT POWER CONTROL BUCK DC/DC CONVERTER 1.8V DUAL BAND PA POWER CONTROL LTC1757 GaAs FET BIAS GENERATOR BASEBAND SIGNAL PROCESSING C AND DSP ANTENNA SWITCH/ DIPLEXER RF LCD BIAS LT1615 LT1617 LTC1550 LTC1550L TRANSMITTER SIM INTERFACE LTC1555 LTC1755 LTC1986 Li-Ion PROTECTOR 5V SIGNALS VCO POWER SUPPLY LTC1682 LTC1982 Li-Ion 5V FREQUENCY SYNTHESIZER INFRARED INTERFACE LT1328 SIM RECEIVER *FOR 2-CELL NiMH DESIGNS , LTC and LT are registered trademarks of Linear Technology Corporation Linear Technology Corporation * 1630 McCarthy Blvd. * Milpitas, CA 95035-7417 * (408) 432-1900 * www.linear-tech.com * Literature Only: 1-800-4-LINEAR Rev B 0300 Cellular Telephones Power Management and Signal Conditioning InfoCard 19 Battery Chargers for NiMH and Li-Ion Compact Li-Ion Cell Phone Charger (0.8A) Precision Constant-Current/Constant-Voltage Control Only One Low Cost Resistor Required to Program Charge Current Tiny, Thermally Enhanced Packages D3 MBRM120T3 VIN 8.2V TO 20V D1 MBRM120T3 VCC CIN* 10F LT1510/LT1512/LT1571: VDD High Switching Frequency for Small Inductor Size High Efficiency Current Mode PWM Battery Negative Terminal May Be Tied Directly to Ground LT1571 Has Preset Outputs: 4.1V, 4.2V, 8.2V, 8.4V 6.19k Programmable Charge Termination Timer End of Charge Detection Output Automatic Trickle Charge of Low Voltage Cells Fixed Outputs for Li-Ion Cell Voltages Automatic Battery Refresh (LTC1730/LTC1732) Battery Temperature Sensing (LTC1730) + + L1** 10H BOOST D2 MMBD914L VC 1k 4.2V Li-Ion BATTERY C1 0.22F 0.33F 300 SENSE CAP CHARGE COMPLETE LTC1730 Pulse Charger, LTC1731/ LTC1732 Linear Chargers: PROG 1F 100k SW LT1571-5 COUT*** 22F FLAG BAT SELECT BAT2 GND 0.1F *TOKIN OR MARCON CERAMIC SURFACE MOUNT **COILTRONICS TP3-100, 10H, 2.2mm HEIGHT (0.8A CHARGING CURRENT) COILTRONICS TP1 SERIES, 10H, 1.8mm HEIGHT (<0.5A CHARGING CURRENT) ***PANASONIC EEFCD1B220 500mA Li-Ion Charger VIN 5V TO 15V MBRM120T3 7 1k VCC SENSE 2 DRV CHRG RSENSE 0.2 8 6 Q1 Si9430DY LTC1731-4.2 3 TIMER BAT PROG CTIMER 0.1F 1F IBAT = 500mA 1 5 GND RPROG* 19.6k 4 + Li-ION 10F e mpl n i S , ll -Io Sma lete Li ger p r Com ery Cha Batt CELL 1731 TA01 *SHUTDOWN INVOKED BY FLOATING THE PROG PIN Battery Charger Selection Guides Characteristics Max Charging Current Switching Frequency/Type Charges Li-Ion Cells Charges NiCd and NiMH Charge Completion Flag Charge Termination Timer Automatic Trickle Charge Automatic Battery Refresh Battery Temp Sensing Soft-Start with UVLO Automatic Sleep Mode VBAT Maximum Up to 28V Wall Adapter Packages LT1510-5 1.5A 500kHz LT1512 1A 500kHz LT1571-5 1.5A 500kHz LTC1730 1A* Pulse LTC1731 1A** Linear LTC1732 1A** Linear 20V 20V 20V 13.2V 15V 15V SSOP-16 SO-8 *An external FET may be added for higher charge current **Dependent upon external MOSFET selection SSOP-16 SO-8 MSOP-8 SSOP-28 SO-8 Can be synchronized up to 800kHz SEPIC operation for step-up and step-down 2 MSOP-10 1571 F01 Cellular Telephones Power Management and Signal Conditioning InfoCard 19 Low Voltage Step-Down DC/DC Converters LTC1878: 600mA, Synchronous Buck Switching Regulator Industry's Lowest Quiescent Current: 10A High Efficiency: Up to 95% Constant Frequency: 550kHz Wide Input Voltage Range: 2.65V to 6V VOUT from 0.8V Up to VIN No Schottky Diode Required Selectable Burst ModeTM Operation Low Dropout: To 100% Duty Cycle Shutdown Mode IQ: 1A 8-Lead MSOP Package rate Ope ingle S from on Cell I Li Burst Mode is a trademark of Linear Technology Corporation. Choose the Right Step-Down Converter for Your Phone* Characteristics LTC1433/34 LTC1474/75 LTC1503 LT1612 LTC1701 LTC1771 LTC1877/78 Input Voltage Range 3V to 13.5V 3V to 18V 2.4V to 6V 2V to 5.5V 2.5V to 5.5V 2.7V to 20V 2.65V to 10V (LTC1877) 2.65V to 6V (LTC1878) Max Output Current 450mA 300mA 100mA 500mA 500mA 5A** 600mA Quiescent Current 470A 10A 25A 150A 135A 10A 10A Switching Frequency to 700kHz 50kHz to 200kHz 600kHz 800kHz 1MHz 100kHz to 250kHz 550kHz Synchronization Range to 700kHz 92.5% >80% >80% 94% 93% Peak Efficiency 400kHz to 700kHz 93% 95% Max Duty Cycle 100% 100% 100% 90% 100% 100% 100% Other Features Low Noise Fixed Freq Programmable Current Limit No Inductor Tiny Size Synchronous Constant Freq < 0.6cm2 Solution External FET Soft-Start Synchronous Constant Freq Packages SSOP-16 SSOP-20 MSOP-8 SO-8 MSOP-8 SO-8 MSOP-8 SO-8 SOT-23 MSOP-8 SO-8 MSOP-8 *Other switching regulator controllers available for higher output current Fixed off-time device **Select external FET for current range desired Efficiency vs Output Load Current (Burst Mode Operation Selected) 100 High Efficiency Step-Down Converter ency ffici A E % > 90 m 400 ! fro 00mA to 4 VIN 2.65V TO 6V 10F** CER 7 6 1 2 SW SYNC VIN 10H* 5 + LTC1878 220pF GND VFB Small MSOP Package! 47F*** RUN ITH VOUT 2.5V 20pF 887k 3 EFFICIENCY (%) 80 412k 4 60 40 Burst Mode OPERATION VIN = 5V VIN = 3.6V PULSE SKIP VIN = 5V VIN = 3.6V 20 L = 10H VOUT = 2.5V 0 0.1 10 100 1 OUTPUT CURRENT (mA) 1878 TA01 *TOKO D62CB A920CY-100M **TAIYO-YUDEN CERAMIC LMK325BJ106MN ***SANYO POSCAP 6TPA47M 1000 1878 TA02 LTC1503: High Efficiency Inductorless Step-Down DC/DC Converter Efficiency vs Input Voltage Single Li-Ion to 2V DC/DC Converter 100 % y o 40 c Up t Efficien O r e D High an an L Th LTC1503-2 1-CELL Li-Ion OR 3-CELL NiMH 10F 1F VIN VOUT 2 C1- C2 - 3 + 5 C1 C2 1 8 + 6 SHDN/SS GND 10F LTC1503-2 VOUT = 2V IOUT = 100mA 80 EFFICIENCY (%) 4 1F 7 1503-2 TA01 60 "IDEAL" LDO* 40 No Inductors Needed Low Power: 25A Quiescent Current, 5A in Shutdown Shutdown Disconnects Load from VIN Available with Fixed 1.8V or 2V Output Small MSOP and SO-8 Packages VOUT = 2V IOUT = 100mA 20 2 3 4 INPUT VOLTAGE (V) 5 6 1503-2 TA02 *LOW DROPOUT VOLTAGE LINEAR REGULATOR 3 Cellular Telephones Power Management and Signal Conditioning InfoCard 19 Low Dropout Voltage Regulators LT1761/LT1762/LT1962/LT1763: Ultralow Noise LDO Regulators with Lowest Quiescent Current Low Noise: 20VRMS (10Hz to 100kHz) Micropower: 20A to 30A Quiescent Current, 1A in Shutdown Mode Low Dropout Voltage: 250mV to 350mV at Rated Load Stable with Tiny Ceramic Output Caps: 1F to 10F Reverse Battery Protection No Protection Diodes Needed Fixed and Adjustable Output Versions LT1761 Output Noise (BW = 10Hz to 100kHz) Choose the Right LDO Regulator for Your Application Characteristics Max Output Current Supply Current LT1120A LT1121 LT1129 LT1521 LT1761 LT1762 LT1962 LT1763 125mA 150mA 700mA 300mA 100mA 150mA 300mA 500mA 20A 30A 50A 12A 20A 25A 30A 30A Max Input Voltage 36V 30V 30V 20V 20V 20V 20V 20V Dropout Voltage* 0.4V 0.42V 0.45V 0.5V 0.3V 0.35V 0.35V 0.35V Packages SO-8 SO-8 SOT-223 SO-8 MSOP-8 SO-8 SOT-223 SOT-23 MSOP-8 MSOP-8 SO-8 *At maximum output current. 20VRMS alow Ultr ise No 1.5V Low Noise Supply OUT IN VIN 2V TO 20V 1F 1.5V AT100mA + 0.01F LT1761-BYP 56.2k BYP 10F ADJ GND 243k COUT = 10F 1ms/DIV CNOISE = 0.01F 1761 TA01 SIM and Smart Card Interface > 10kV ESD On All SIM/Smart Card Contact Pins Short-Circuit and Overtemperature Protected 3V 5V Signal Level Translators Soft-Start Limits Inrush Current at Turn-On 3V GSM CONTROLLER ESD 10kV ected Prot 3V 1 2 3 LTC1555/LTC1556 Power Supply and Level Translators for 3V/5V SIM Cards Fully ISO 7816-3 and EMV Compliant Buck-Boost Charge Pump Generates 3V or 5V 2.7V to 6V Input Voltage Range Alarm Output Indicates Fault (LT1755) May Be Paralleled for Multiple Cards (LTC1755) Very Low Operating Current: 60A Very Low Shutdown Current: <2A 16- and 24-Pin Narrow SSOP 5 6 Step-Up/Step-Down Charge Pump Generates 5V Input Voltage Range: 2.7V to 10V Very Low Operating Current: 50A Very Low Shutdown Current: < 1A 650kHz Switching Frequency Auxiliary 4.3V LDO or Power Switch (LTC1556) 16- and 20-Pin Narrow SSOP LTC1755/LTC1756 Smart Card Interface 4 VCC VIN 2.7V TO 10V LTC1555 7 8 CIN CLK RIN RST SIM 16 CLK 15 RST 14 DATA I/O DDRV VCC DVCC VIN SS C1 + 11 M1 C1 - 10 M0 GND I/O 13 12 + 0.1F 10F + VCC 5V 5% IVCC 10mA 10F 9 GND 1555/56 TA01 3.3V SMART CARD PRESENT SWITCH 1 2 3 4 C3 10F GND VCC AUX1 SMART CARD AUX2 I/O RST CLK C2 10F 5 6 7 8 9 10 11 12 PRES PWR 5V/3V CARD CS ALARM NC/NO READY GND DVCC VIN LTC1755 C - VCC C+ AUX1 AUX1IN AUX2 AUX2IN I/O DATA RST RIN CLK CIN 24 23 22 21 20 19 18 C1 0.68F CONTROLLER 17 16 15 14 13 1755 TA01 4 Cellular Telephones Power Management and Signal Conditioning InfoCard 19 Boost DC/DC Converters LTC1682: Low Noise Charge Pump with LDO Regulator Adjustable or Fixed Boosted Output: 2.5V to 5.25V Low Output Noise: 60VRMS Input Voltage Range: 1.8V to 4.4V No Inductors Needed Output Current to 50mA Low Operating Current: 110A Low Shutdown Current: 1A Low ESR, Low Value Ceramic Caps Doubler Charge Pump with Low Dropout Linear Regulator Output 8-Lead MSOP and SO Packages 5V VCO Power Supply, VIN = 2.5V to 4.4V e Nois Low e Pump rg Cha MSOP! in 8 VOUT CPO 4.7F 7 VIN 2.5V TO 4.4V 6 5V LOW NOISE 1 C2 4.7F 2 C+ SHDN LTC1682-5 VIN 3 FILT 0.22F 5 4.7F C- VCO SHUTDOWN 4 GND CFILT 1nF 1682 TA01 LTC1682-5 Output Noise 60VRMS (100kHz BW) 100s/DIV 1682 G06 High Efficiency Boost Converter Selection Guide Characteristics LT1307 LT1308 LT1316 LT1610 LT1615 Input Voltage Range 1V to 12V 1V to 12V 1.65V to 8V 1V to 8V 1.2V to 15V Max Switch Current 500mA 2A 500mA 450mA 350mA Supply Current 50A 140A 33A 30A 30A Switching Frequency 600kHz 600kHz 120kHz 1.7MHz to 1.4MHz Peak Efficiency 80% 91% 87% 77% 84% Other Features Low-Battery High Power Adj Current Tiny 34V Switch, Detector from Limit Components Tiny Size Single Cell Packages MSOP-8 SO-8 MSOP-8 MSOP-8 SOT-23 SO-8 SO-8 SO-8 *Data is shown for 5V output version; varies slightly for 3.3V output version. Constant off-time, variable on-time operation. 5 LT1615-1 LTC1682 LTC1751* 1V to 15V 1.8V to 4.4V 2.7V to 5.5V 100mA 50mA 100mA 30A 110A 20A to 1.4MHz 550kHz 800kHz 84% 82% Single Cell Low Noise Soft-Start, Power Good Operation 60VRMS SOT-23 MSOP-8 SO-8 MSOP-8 LTC1754* 2.7V to 5.5V 50mA 13A 700kHz 82% Tiny Size, Load Disconnect SOT-23 Cellular Telephones Power Management and Signal Conditioning InfoCard 19 DC/DC Conversion for LCD Bias Contrast Control for LCD Displays Boosted Positive or Negative Voltage Regulator with Small Size, Very Low Component Height and Long Battery Life Peak Current Controlled to Keep the Inductor from Saturating and to Limit Output Ripple Single Cell Li-Ion to 20V Converter for LCD Bias Inverting Converters for LCD Bias Characteristics Input Voltage Range Output Voltage Range Max Switch Current Supply Current Switching Frequency Peak Efficiency Other Features LT1615 LT1615-1 LT1617 1.2V to 15V 1V to 15V 1.2V to 15V to 34V to 34V to -34V 350mA 100mA 350mA 30A 30A 30A to 1.4MHz* to 1.4MHz* to 1.4MHz* 84% 84% 84% 34V Switch Single Cell Tiny Size Tiny Size Operation Package SOT-23 SOT-23 SOT-23 *Constant off-time, variable on-time operation. LT1617-1 1V to 15V to -34V 100mA 30A to 1.4MHz* 84% Single Cell L1 10H VIN 2.5V TO 4.2V VIN D1 20V 12mA R1 2M SW C2 1F LT1615 SHDN FB GND C1 4.7F R2 130k C1: TAIYO YUDEN LMK316BJ475 C2: TAIYO YUDEN TMK316BJ105 D1: MOTOROLA MBR0530 L1: MURATA LQH3C100K24 SOT-23 1615/-1 TA01 Color LCD Backlight Supply (White LEDs) LTC1754/LTC1751 Are Perfect for 3V to 5V Conversion to Drive White LED Backlights for Color LCD Displays LTC1754 is Smallest 50mA Solution LTC1751 Adds Power Good and Undervoltage Outputs, Plus 100mA Output LTC1751 Includes Soft-Start to Improve PWM Dimming LTC1682 for Lowest Noise: Includes LDO Post Regulator te Whi For ED L hts! klig c a B 1F 6 VIN 2.7V TO 5.5V 5 10F ON OFF C+ VIN 4 C- VOUT 50mA, UP TO FOUR WHITE LEDs 1 LTC1754-5 3 SHDN GND 10F *** 2 100 100 100 LTC1754-5 GaAs FET Bias LTC1550L/LTC1551L: Low Noise Charge Pump Negative Bias Generators Low Output Ripple: Less Than 1mVP-P High Charge Pump Frequency: 900kHz Small Charge Pump Capacitors: 0.1F Fixed - 4.1V, - 2.5V, - 2V or Adjustable Output Shutdown Mode Drops Supply Current to 0.2A High Output Current: Up to 20mA Output Regulation: 2.5% MSOP and SO-8 Packages tput V Ou e m 1 l < Ripp GaAs FET Bias Generator Family Characteristics Min Input Voltage Quiescent Current Oscillator Frequency Other Features Packages LTC1261L 2.7V 650A 650kHz Converts 3V to - 4V SO-8 LTC1429 3V 600A to 2MHz - 3.5V, - 4V, - 4.5V - 5V Outputs SO-8, SO-14 LTC1550L/LTC1551L 2.7V 3.65mA 900kHz < 1mV Output Ripple SSOP-16 MSOP-8, SO-8 Linear Technology Corporation * 1630 McCarthy Blvd. * Milpitas, CA 95035-7417 * (408) 432-1900 * www.linear-tech.com * Literature Only: 1-800-4-LINEAR ic19b (c)1997 LT/TP 0300 4K