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1.5a low voltage low dropout cmos regulator 2007-12-6 1/11 fsp2162 ? applications z dsp, fpga, and microprocessor power supplies z 1.2v core voltage for dsps z sata power supply z lcd tv/ monitors z wireless devices z communication devices z portable electronics z post regulator for smps ? pin configuration (top view) ? block diagram pin number pin name pin function 1 gnd ground 2 vin input 3 en enable pin 4 gnd ground 5 pwrgd power good 6 sense sense 7 vout output 8 gnd ground ? features z l ow-dropout regulator supports input voltages down to 1.4v z output voltage available in 0.9v, 1.0v, 1.2v, 1.5v, 1.8v, 2.5v,2.8v,2.85v,3.0v, 3.3v z stable with a ceramic output capacitor of 1.0uf or higher z low dropout voltage:150mv at 1.5a z low quiescent current z over temperature shutdown z short circuit protection z low temperature coefficient z standard sop8l/ep (exposed pad) package ? general description the fsp2162 is a 1.5a cmos ldo regulator that features a low quiescent current, ultra low input, output and dropout voltages, as well as over temperature shutdown. it is available in sop8l/ep (exposed pad) package. the fixed output voltage of the fsp2162 is set at the factory and trimmed to 2%. the fsp2162 is stable with a ceramic output capacitor of 1.0uf or higher. this family of regulators can provide either a stand-alone power supply solution or act as a post regulator for switch mode power supplies. they are particularly well suited for applications requiring low input and output voltage
1.5a low voltage low dropout cmos regulator 2007-12-6 2/11 fsp2162 ? typical applications circuit ? absolute maximum ratings parameter rating unit input supply voltage +4 v maximum output current pd/(vin-vo) output pin voltage -0.3 to vin+0.3 v operating temperature -40 to 85 c operating junction temperature -40 to 125 c storage temperature -65 to 150 c maximum junction temperature 150 c lead temperature (soldering, 5 sec) 300 c note: these are stress ratings only and functional operati on is not implied. exposure to absolute maximum ratings for prolonged time periods ma y affect device reliability . all voltages are with respect to ground. ? recommended operating conditions parameter rating unit input supply voltage 1.4 to 3.6 v operating temperature -40 to 85 c operating junction temperature -40 to 125 c
1.5a low voltage low dropout cmos regulator 2007-12-6 3/11 fsp2162 ? electrical characteristics (v out = v in + 0.5v, c in = 1 f, c o = 2.2 f, t a = 25 c unless otherwise specified.) parameter symbol test conditions min typ max unit input voltage v in note1 3.6 v output voltage accuracy v o i o = 100ma -2 +2 % short circuit current i sc v o < 0.3v 1.0 a ground current i gnd i o = 1ma to 1.5a 600 a quiescent current i q i o = 0ma 90 150 a i o = 10ma, v o 2.5v v in =v o + 0.5v to v o + 1.5v 0.5 1 line regulation lnr i o = 10ma, v o 2.5v v in = 3.3v to 3.6v 0.5 1 %/v load regulation error ldr i o = 1ma to 1.5a 0.5 2 %/a temperature coefficient t c 40 ppm/ c over temperature shutdown ots 150 c over temperature hystersis oth 50 c f=100hz 55 f= 1khz 55 power supply ripple rejection psrr i o = 100ma v o =1.5v f= 10khz 35 db v o = 0.9v 330 500 v o = 1.0v 220 400 1.2v v o < 2.5v 50 200 i o = 500ma v o 2.5v 40 150 v o = 0.9v 330 500 v o = 1.0v 220 400 1.2v v o < 2.5v 150 350 dropout voltage v drop i o = 1.5a v o 2.5v 120 300 mv output noise v n f = 10hz to 100khz 40 v rms note 1 the minimum input voltage of the fsp2162 is deter mined by output voltage and dropout voltage. the minimum input voltage is defined as: v in(min) =v o +v drop
1.5a low voltage low dropout cmos regulator 2007-12-6 4/11 fsp2162 ? application information the fsp2162 family of low-dropout (ldo) regulators have se veral features that allow them to apply to a wide range of applications. the family operates with very low input voltage (1.4v) and low dropout voltage (typically 150mv at full load), making it an efficient stand-alone power supply or post regulator for battery or switch mode power supplies. the 1.5a output current make the fsp2162 family suitabl e for powering many microprocessors and fpga supplies. the fsp2162 family also has low output noise (typically 40 vrms with 2.2f output capacitor), making it ideal for use in telecom equipment. external capacitor requirements a 2.2f or larger ceramic input bypass capacitor, c onnected between vin and gnd and located close to the fsp2162, is required for stability. a 1.0uf minimum value ca pacitor from vo to gnd is also required. to improve transient response, noise rejection, and ripple rejecti on, an additional 10f or larger, low esr capacitor is recommended at the output. a higher-value, low esr output capa citor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source, especially if the minimum input voltage of 1.4 v is used. regulator protection the fsp2162 features internal current limiting, therma l protection and short circuit protection. during normal operation, the fsp2162 limits output cu rrent to about 3a. when current limit ing engages, the output voltage scales back linearly until the over current condition ends. while curr ent limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ra tings of the package. if t he temperature of the device exceeds 150c, thermal-protec tion circuitry will shut down. once the dev ice has cooled down to approximately 50c below the high temp trip point, regulator operation resume s. the short circuit current of the fsp2162 is about 1a when its output pin is shorted to ground. thermal information the amount of heat that an ldo linear regulator generates is: p d =(v in -v o )i o . all integrated circuits have a maximum allowable junction temperature (tj max) above which normal operation is not assured. a system designer mu st design the operating environment so t hat the operating junction temperature (tj) does not exceed the maximum junction temperature (tj max). the two main environmental variables that a designer can use to improve thermal performance are ai r flow and external heatsinks. the purpose of this information is to aid the designer in determining the proper operating environment for a linear regulator that is operating at a specific power level. in general, the maximum expected power (p d(max) ) consumed by a linear regulator is computed as: where: v i (avg) is the average input voltage. v o(avg) is the average output voltage. i o(avg) is the average output current. i (q ) is the quiescent current. for most ldo regulators, the quiescent current is insigni ficant compared to the average output current; therefore, the term v i(avg) xi (q) can be neglected. the operating junction te mperature is computed by adding the ambient temperature (ta) and the increase in temperature due to t he regulator's power dissipati on. the temperature rise is computed by multiplying the maximum expected power dissip ation by the sum of the t hermal resistances between the junction and the case (r jc), the case to heatsink (r cs), and the heatsink to ambient (r sa). thermal resistances are measures of how effectively an object dissi pates heat. typically, the larger the device, the more surface area available for power dissipation so that the object's thermal resistance will be lower.
1.5a low voltage low dropout cmos regulator 2007-12-6 5/11 fsp2162 ? typical performance characteristics
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1.5a low voltage low dropout cmos regulator 2007-12-6 8/11 fsp2162 ? typical performanc e characteristics continued
1.5a low voltage low dropout cmos regulator 2007-12-6 9/11 fsp2162 ? ordering information ? marking information fsp2162xxxx package type: s: sop8l/ep packing: a: tape & reel output voltage: 33: 3.3v 30: 3.0v 285: 2.85v 28: 2.8v 25: 2.5v 18: 1.8v 15: 1.5v 12: 1.2v 10: 1.0v 09: 0.9v temperature grade: d: -40~85 part number: 2162-09: 0.9v 2162-10: 1.0v 2162-12: 1.2v 2162-15: 1.5v 2162-18: 1.8v 2162-25: 2.5v 2162-28: 2.8v 2162-285: 2.85v 2162-30: 3.0v 2162-33: 3.3v internal code 2162-vv yywwxx date code: yy: year (01=2001) ww: nth week (01~52) logo
1.5a low voltage low dropout cmos regulator 2007-12-6 10/11 fsp2162 ? package information dimensions in millimeters dimensions in inches symbol min. max. min. max. a 5.80 6.20 0.232 0.248 b 4.80 5.00 0.192 0.200 c 3.80 4.00 0.152 0.160 d 0 5 0 5 e 0.40 0.90 0.016 0.036 f 0.19 0.25 0.0076 0.010 m 0 0.15 0 0.006 h 0.35 0.48 0.014 0.0192 l 1.35 1.75 0.054 0.070 g 1.27typ. 0.0496typ. x 2.28 0.0912 option1 y 2.28 0.0912 x 2.41 0.0964 option2 y 3.30 0.132
1.5a low voltage low dropout cmos regulator 2007-12-6 11/11 fsp2162

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