V CC AVG PROG LTMS GND IN IN k % V IN LTC SYNCHRONOUS BUCK REGULATOR I TH INTV CC.k % FB (V BATT.V) TO V V IN LT/ F I BATT TO A SIMPLIFIED SCHEMATIC. SEE FIGURE FOR COMPLETE SCHEMATIC SW µf V µh.ω.m.% k.% µf V V BATT EFFICIENCY (%) V IN = V V BATT = V 9 V BATT = V 9 V BATT = V BATTERY CHARGE CURRENT (A) / TA -
TOP VIEW TOP VIEW TOP VIEW GND IN AVG PROG V CC IN MS PACKAGE S PACKAGE -LEAD PLASTIC MSOP -LEAD PLASTIC SO θ JA = C/W (MS) θ JA = C/W (S) ORDER PART NUMBER LTCS LTIS LTCMS MS PART MARKING BC NC NC GND MODE NC IN GN PACKAGE -LEAD PLASTIC SSOP θ JA = 9 C/W AVG NC PROG PROG AVG V CC NC 9 IN ORDER PART NUMBER LTCGN LTIGN PROG A AVG A A A GND B IN B IN B V CC B GN PACKAGE -LEAD PLASTIC SSOP θ JA = 9 C/W V CC A IN A IN A GND A B B AVG B 9 PROG B ORDER PART NUMBER LTCGN LTIGN SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supply V CC V Supply Voltage... V I CC DC Active Supply Current = AVG = PROG = PROG = V CC.. ma LTGN.V V CC.V, IN IN = mv. ma DC Active Supply Current = AVG = PROG = V CC.. ma LTS, LTMS, / LTGN.V V CC.V, IN IN = mv. ma DC Active Supply Current = AVG = PROG = V CC..9 ma LTS, LTMS, / LTGN.V V CC.V, IN IN = mv. ma Current Sense Amplifier V CM Input Common Mode Range V V ID Differential Input Voltage Range V V CM V mv (IN IN ) V OS Input Offset - Measured at Output V CC V CM V mv (V ) V ID = mv mv -
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Current Sense Amplifier V OSAVG Input Offset - Measured at Output V CC V CM V mv (V AVG ) mv V ID mv mv V CM = V, V ID = mv mv V OSAVG Input Offset - Measured at Output V CC V CM V mv (V AVG ) V V ID mv mv V No-Load Output Offset V V CM V, V ID = V, Referenced to V CC. mv I B(IN, IN ) Input Bias Current (Sink) V CC V CM V (Note ) µa µa Input Bias Current (Source) V CM = V (Note ).. ma. ma Transconductance Amplifier g m Amplifier Transconductance µmho µmho A V Amplifier Voltage Gain V V IOUT V db V OLIOUT Saturation Limit (Sink) I IOUT = µa.. V I IOUT = µa.. V I IOUT = ma.. V V PROG PROG Input Range V CC. V CC V I BPROG Input Bias Current Measured at PROG Pin na V OSPROG Input Offset Voltage I IOUT = µa mv (V AVG V PROG ) mv End-of-Cycle Comparator V PROG PROG Input Range V CC. V CC. V V HYST Input Hysteresis Measured at AVG Pin mv I BPROG Input Bias Current Measured at PROG Pin na V OLMODE Output Logic Low Output (Sink) I MODE =.ma.. V I MODE = ma.. V -
V V CC Ω.k ( GAIN) ( GAIN) AVG INTV CC CURRENT RESISTOR V ID IN IN PROG AMPLIFIER k g m ( GAIN) AVG* MODE* PWM CONTROLLER I TH END-OF-CYCLE (ACTIVE LOW) PROG* *AVAILABLE IN THE LTGN ONLY GND LT/ FBD -9
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RUN C nf C.µF XR R k R.M C C, C, pf C OSC RUN/SS I TH SFB SGND LTC TG BOOST SW V IN INTV CC D* C, D* C SiDY L µh C µf V R.Ω C µf V C µf V V IN.V TO V V BATT.V Li-ION R P k % C C C C,.µF IN IN V CC GND LTMS PROG AVG C9, pf C pf V O C, pf BG PGND EXTV CC C.µF SiDY * D, D: CENTRAL SEMICONDUCTOR CMDSH- R P.k % R F k.% R F.M.% LT/ F -
V µf C µf AVG PROG LTMS GND V CC R P k % R P k % C µf CONNECTED AS IN FIGURE LTGN AVG V EE PROG PROG MODE AVG IN V CC IN R k C,.µF C.µF R.k R k RUN IN IN VIN V SW S/S V FB GND GND TAB LT µf V C I FB XR R.Ω LB µh.µf Ω.µF TO SYSTEM LOAD MBRS LA µh R.Ω k.k V BATT =.V µf Li-ION END-OF-CYCLE (ACTIVE LOW) LT/ F / F -
µ µ -
V PROG OFFSET (mv) V CC = V V ID = mv V CM =.V V PROG OFFSET (mv) V CC = V V CM =.V = µa SINK CURRENT (µa) IN IN (V ID ) INPUT (mv) LT/ Fa LT/ Fb V PROG OFFSET (mv) V CC = V V CM =.V = µa IN IN (V ID ) INPUT (mv) ADDITIONAL INPUT REFERRED OFFSET (mv) ± ± ± ± ± ± ± V CC = V V ID = mv = µa IN, IN COMMON MODE VOLTAGE (V CM ) (V) LT/ Fc LT/ Fd PROGRAMMING OFFSET (mv) V PROG V PROG V ID = mv V CM =.mv = µa.... V CC (V). LT/ Fe -
V TO V LTCS- IN OUT SHDN GND DVH Ω µf SHUTDOWN VNLM Ω N9.Ω k AVG PROG LTMS GND V CC IN IN I PROG A TO A k % R PROG = (I PROG )(,) R PROG = k FOR A OUTPUT LT/ TA V TO V µf V TPS.k N Si9 MBRST µh CTX-.Ω µf V TPS A TO A k N V N Ω.k k µf AVG PROG LTGN PROG GND AVG MODE V CC IN 9 IN k.µf k I PROG k % R PROG N k = (I PROG )(,) R PROG = 9k FOR A OUTPUT LT/ TA -
V.Ω Si9DY V AT A PROTECTED k FAULT C DELAY N9 k AVG PROG LTMS GND V CC Ω.k k N k IN IN TYPICAL DC TRIP AT.A A FAULT TRIPS IN ms WITH C DELAY =.µf N9 LT/ TA PART NUMBER DESCRIPTION COMMENTS LTC High Efficiency Low Noise Synchronous Step-Down -Pin Narrow SO and SSOP, V IN V, Programmable Switching Regulator Constant Frequency LTC/LTC-PPL/ High Efficiency Low Noise Synchronous Step-Down Full-Featured Single Controller, V IN V, Programmable LTC Switching Regulator Controllers Constant Frequency LTC/LTC9 Dual High Efficiency Low Noise Synchronous Step-Down Full-Featured Dual Controllers, V IN V, Programmable Switching Regulators Constant Frequency LT.A Constant-Current/Constant-Voltage Battery Charger Step-Down Charger for Li-Ion, NiCd and NiMH LT.A Constant-Current/Constant-Voltage Battery Charger Step-Down Charger that Allows Charging During Computer with Input Current Limiting Operation and Prevents Wall-Adapter Overload LT SEPIC Constant-Current/Constant-Voltage Battery Charger Step-Up/Step-Down Charger for up to A Charging Current LT SEPIC Constant-Current/Constant-Voltage Battery Charger Step-Up/Step-Down Charger for up to A Charging Current LTC-AUX Dual High Efficiency Low Noise Synchronous Step-Down V Standby in Shutdown, V IN V, Programmable Switching Regulator Constant Frequency LTC9 Dual High Efficiency Low Noise Synchronous Step-Down V Standby in Shutdown, V IN V, Programmable Switching Regulator Constant Frequency -