TS1900

T S1 9 0 0 Ultra Low Quiescent Current Smart Load Switch SOT-25 Pin Definition: 1. Output 2. Ground 3. Enable 4. Input 5. Input General Description TS1900 is a high side slew rate controlled smart load s witch. The s lew rate control in TS1900 can effec tively avoid the large in-rush current which is commonly observed in normal power switches. Moreover, the level shift in TS1900 allows cus tomers to control 1.8 to 6.5V system with 1.5V logic and without sacrificing leakage current. TS1900 has typical low R DS(on) at 100mΩ , it allows lar ge power handling capabilities. And very low quiescent current and fast load discharge make it ideal for pow er sensitiv e applications nowadays . Features ● ● ● ● ● ● ● ● ● ● 1.8 to 6.5V Input Voltage Range Slew Rate Limited at 100uS Very Low R DS(ON), Typically 100mΩ Less than 1uA Shutdown Current Very Low Quiescent C urrent, Typically 2uA Fast Shutdown Load Discharge Thermal Fault Protec tion TTL / C MOS Input Logic Level 2KV ESD Rating EMI Free Circuit Ordering Information Part No. TS1900C X5 RF Package SOT-25 Packi ng 3Kpcs / 7” Reel Pin Description Pin 1 2 3 4,5 Name Ou t Gn d EN Vin Function Drain of P-CH Power MOSFET Gnd Pin. Connec t directly to local ground plane. Enable C ontrol Input Source of P-CH Pow er MOSFET Applications ● ● ● ● ● ● Cellular and Smart Phone Hot Swap Supplies Microprocessors and D SP Core Supplies PD As MP3 Players Digital Still and Video C ameras Portable Ins truments Application Circuit ● Absolute Maximum Rating Parameter Input Supply Voltage Enable to Ground Voltage Output to Ground Voltage Power Dissipation Maximum Continues C urrent Junction Temperature Range Storage Temperature Range ESD H BM / MM Symbol VIN to Gnd VEN to Gnd VO UT to Gnd PD ICONTINUE TJ TSTG Limit -0.3 to 6.5 -0.3 to 6.5 -0.3 to 6.5 Inter nally Limited 2.2 +1 5 0 - 6 5 ~ +1 5 0 2 / 200 Unit V V V A °C °C KV / V 1/5 Version: A07 T S1 9 0 0 Ultra Low Quiescent Current Smart Load Switch Recommended Operating Conditions (Note 2) Parameter Supply Voltage Operating Temperature Range Symbol VIN TOPR Limit -0.3 to 6.5 - 40 t o + 85 220 Unit V °C o Junction to Ambient Ther mal Resis tance (PC B mounted) R ӨJ A Note: 1. Exceeding these ratings may damage the dev ice. 2. The device is not guaranteed to function outside of its operating conditions. C/W Electrical Specifications (VIN=5V, VEN=1.5V, TA=25°C, unless otherwise noted) Parameter Input Voltage Quiescent Current Shutdown Current Off Switch C urrent Symbol VIN IQ ISD ISO RDS(ON) VIL VIH ISINK TD(ON) TON TD(OFF) RPD TSD TR Test C ondit ions VEN=1.5V VEN=0V, Out = Open VEN=0V, VOUT = 0 VIN=5V @ 100mA VIN=4.2V @ 100mA VIN=3V @ 100mA VIN=1.8V @ 100mA ROUT = 10Ω ROUT = 10Ω VEN=5.5V ROUT = 10Ω ROUT = 10Ω ROUT = 10Ω VEN=0V Min 1.8 --------1 -----140 120 TYP 5 2 0.05 0.05 100 110 130 200 --0.01 40 100 4 150 160 140 MA X 6.5 4 1 1 130 140 160 250 0.4 -1 80 150 10 250 180 160 Units V µA µA µA On Resis tance mΩ EN Input Logic Low EN Input Logic High EN Input Leakage Output Turn- On D elay Output Turn- On R ise Time Output Turn- Off D elay Output Pull-Down Resis tance Thermal Shutdown Temperature Thermal R ecovery Temperature V V µA uS uS uS Ω °C °C Block Diagram 2/5 Version: A07 T S1 9 0 0 Ultra Low Quiescent Current Smart Load Switch Application Information The TS1900 featured very low quiescent current and very low RD S(ON) and making them ideal for battery- powered applications . The ENABLE control pin is TTL compatible and driven by 1.5V beyond making the TS1900 an ideal levelshifting load switch. Input C apacitor Selection A 1UF or larger input capacitor is recommended to pr event load transients from affecting ups tream c ircuits . CIN should be located as close to the device VI N pin as prac tically. There is no specific requirement type of capacitor is recommended. However, for higher current operation, ceramic capacitors are recommended for CIN. L=[VOUT X (VIN- VOUT)] / [VIN X ( ΔIL X(FOSC] Where ΔIL is the induc tor ripple current. Larger induc tance is recommended for better efficiency in light load c ondition. Output Capacitor Selection For proper slew oper ation, a 0.1uF or gr eater is recommended. The output capacitor has also no specific capacitor type requirement. If desired, COUT maybe increased without limit to accommodate any load transient Reverse Output-to- Input Volt age Conditions and Protection Under normal conditions, there is a parasitic diode between the output & input of the load switch. In cas e of VOUT exceeding VIN, this would forward bias the internal parasitic diode and allow excessive current flow into the VOUT pin and possibly damage the load switch. In applications, where there is a possibility of VOUT exc eeding VIN for brief periods of time during operation, the use of larger value CIN capacitor is highly recommended. A larger value of CIN w ith respect to COUT w ill affect a slower CIN decay rate dur ing shutdown, thus pr eventing VOUT from exceeding VIN. In case of extended period of time for VOUT exceeding VIN, it is recommended to place a Schottky diode fr om VIN to VOUT. Thermal Considerat ions The TS1900 is designed to deliver a continuous load current. The maximum limit is package power dissipation. At any given ambient temperature, the maximum pack age power dissipation can be deter mined by the following equation: PD(MAX) = [TJ(MAX) - TA] / θJA Constraints for the TS1900 are maximum TJ(MAX) = 125°C , and package ther mal resis tance, θJA = 120°C /W. The maximum continuous output current for TS1900 depends on package power dissipation and the R DS(ON) of MOSFET at TJ(MAX). Typical conditions are calculated under nor mal ambient condition where TA = 25° C At 85° C, PD(MAX) = 333mW. At TA = 25 , PD(MAX) = 833mW. The maximum current is calculated by the following equation: IOUT < ( PD(MAX) / R DS(MAX))