View AAT3125ISN-T1_2850326.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

aat3125 usb otg 5v charge pump 3125.2005.12.1.4 1 general description the aat3125 usb on-the-go (otg) charge pump is a member of analogictech's total power management ic? (tpmic?) product family. the device integrates a high efficiency 1.5x fractional 100ma regulated charge pump for supplying v bus with the additional functions required for otg devices (formerly known as dual role devices). four voltage detectors monitor v bus , and a current source dedicated for v bus pulsing is provided for compliance with session request protocol (srp) as defined by the usb otg supplement. the charge pump section uses a high efficiency fractional topology, with a high frequency 750khz switching speed which enables the use of small capacitors (less than 3.3f). the aat3125 fea- tures extremely low quiescent current to extend battery run time. additionally, the device integrates protection features such as under-voltage lockout, and output short circuit and thermal protection. the aat3125 is available in a pb-free, surface mount qfn44-16 package and is rated over the -40c to +85c temperature range. features ?v in range: 2.7v to 5.5v ? regulated fractional charge pump ? 100ma output current ? reverse load protection ? power good flag ? srp detection flag ? srp ready flag ? output short-circuit and thermal protection ? under-voltage protection ? less than 1a consumed while disabled ? designed to allow operation with output capacitance as low as 3.3f ? 16-pin qfn44 package ? -40c to +85c temperature range applications ? cell phones ? hand-held computers ? pdas typical application in pok1 gnd sr out c out c in 1 f 1 f 1 f 1 f 3.3 f to 6.5 f sr pok2 sesdet srrdy en en r1 r2 r3 r4 pok1 vbus pok2 sesdet srrdy aat3125 1 cell li-ion c1 c2 c1+ c1- c2+ c2- 80k ? c cp outcp r cs 0.2 ? chargepump ?
pin descriptions pin configuration qfn44-16 (top view) 1 2 3 4 12 11 10 9 5 6 7 8 16 15 14 13 pok1 pok2 sesdet srrdy out c1+ c1- n/c outcp c2+ c2- gnd n/c vin sr en pin # symbol function 1 pok1 power ok 1. open drain output with 4.0v voltage detector. when the out pin rises above the detected voltage (4.0v), pok1 will transition from low to high state. similarly, when the output falls below 4.0v, pok1 will transition from high to low. a 10k ? pull-up resistor is recommended. 2 pok2 power ok 2. open drain output with 4.4v voltage detector. when the out pin rises above the detected voltage (4.4v), pok2 will transition from low to high state. similarly, when the output falls below 4.4v, pok2 will transition from high to low. a 10k ? pull-up resistor is recommended. 3 sesdet session detect. open drain output with 2.0v voltage detector. when the out pin rises above the detected voltage (2.0v), it will transition from low to high state. similarly, when the output falls below 2.0v, sesdet will transition from high to low. a 10k ? pull-up resistor is recommended. 4 srrdy session request ready. open drain output with 0.6v voltage detector. when the out pin rises above the detected voltage (0.6v), it will transition from low to high state. similarly, when the output falls below 0.6v, srrdy will transition from high to low. a 10k ? pull-up resistor is rec- ommended. 5 out power output to vbus. 6 c1+ flying capacitor 1 positive terminal. 7 c1- flying capacitor 1 negative terminal. 8, 13 n/c no connect. 9 outcp charge pump output. requires 1f bypass capacitor to ground. 10 c2+ flying capacitor 2 positive terminal. 11 c2- flying capacitor 2 negative terminal. 12 gnd ground. 14 vin input power supply. requires 1f bypass capacitor to ground. 15 sr session request input control pin. should not be left floating. must connect to high or low. for more details, see table 1. 16 en enable input control pin. when in the low state, the aat3125 is powered down and consumes a small amount of power. when connected high, it is in normal operation. this pin should not be left floating. for more details, see table 1. ep exposed paddle (bottom); connect to gnd directly beneath package. aat3125 usb otg 5v charge pump 2 3125.2005.12.1.4
aat3125 usb otg 5v charge pump 3125.2005.12.1.4 3 absolute maximum ratings 1 thermal information symbol description value units ja maximum thermal resistance 4 50 c/w p d maximum power dissipation (t a = 25c) 5 2.0 w symbol description value units v in , v out any pin to gnd -0.3 to 6 v t sc out short-circuit duration indefinite s i out 2 output current 150 ma t j operating temperature range -40 to 85 c t s storage temperature range -65 to 150 c v esd esd rating 3 - hbm 2000 v 1. stresses above those listed in absolute maximum ratings may cause permanent damage to the device. functional operation at c ondi- tions other than the operating conditions specified is not implied. only one absolute maximum rating should be applied at any one time. 2. based on long-term current density limitation. 3. human body model is a 100pf capacitor discharged through a 1.5k ? resistor into each pin. 4. mounted on an fr4 board. 5. derate 20mw/c above 25c.
aat3125 usb otg 5v charge pump 4 3125.2005.12.1.4 electrical characteristics 1 v in = 3.5v; c in = c out = c 1 = c 2 = 1.0f; t a = -40c to +85c. unless otherwise noted, typical values are t a = 25c. symbol description conditions min typ max units input power supply v in operating range 2.9 5.5 v i cc3 operating current srp en = 1, sr = 1, out = in 60 110 a i cc2 operating current cp en = 1, sr = 0 1 3 ma i cc1 shutdown current 1 en = 0, sr = 1 1 2 a i cc0 shutdown current 0 en = 0, sr = 0 1 a output power supply v out output regulation i out = 0 4.6 5.25 v i ccout operating current en = 0 7 12 a i out output current 3.2 v in 5.5v, v out > 4.4v 50 65 ma 3.35 v in 5.5v, v out > 4.4v 100 v cs current sense trip level vcs = i out x r cs 40 60 90 mv r off pull-down resistance en = 0, sr = 1 700 1000 1500 ? i sr sr current pulse out < (in-1.0v) 5 10 20 ma charge pump efficiency v in = 3.75v, i out = 50ma 90 % t ss soft-start time out < 0.1 to out > 4.4 100 s f clk clock frequency 750 khz en, sr v il input threshold low 0.4 v v ih input threshold high 1.4 v i en(sink) en input current v in = v en = 5.5v -1 1 a i sr(sink) sr input current v in = v sr = 5.5v -1 1 a pok1 v pok1 pok trip threshold v out rising 3.8 4.0 4.2 v v pok1(hys) pok hysteresis 50 mv v pok1(ol) pok output voltage i sink = 1ma 0.3 v i pok1 pok leakage current v pok = 5.5, 25c 100 na pok2 v pok2 pok trip threshold v out rising 4.18 4.4 4.62 v v pok2(hys) pok hysteresis 50 mv v pok2(ol) pok output voltage i sink = 1ma 0.3 v i pok2 pok leakage current v pok = 5.5, 25c 100 na 1. the aat3125 is guaranteed to meet performance specifications over the -40c to +85c operating temperature range and is assu red by design, characterization, and correlation with statistical process controls.
electrical characteristics 1 v in = 3.5v; c in = c out = c 1 = c 2 = 1.0f; t a = -40c to +85c. unless otherwise noted, typical values are t a = 25c. table 1: operational states. charge current discharge en sr pump source srrdy pok sesdet resistor 1 0 on off on on on off 1 1 off on on on on off 0 0 off off off off on off 0 1 off off off off on on symbol description conditions min typ max units sesdet v sd sd trip threshold v out rising 1.9 2.0 2.1 v v sd(hys) sd hysteresis 50 mv v sd(ol) sd output voltage i sink = 1ma 0.3 v i sd sd leakage current v sd = 5.5, 25c 100 na srrdy v srrdy srrdy trip threshold v out rising 0.4 0.6 0.8 v v srrdy(hys) srrdy hysteresis 20 mv v srrdy(ol) srrdy output voltage i sink = 1ma 0.3 v i srrdy srrdy leakage current v srrdy = 5.5, 25c 100 na aat3125 usb otg 5v charge pump 3125.2005.12.1.4 5 1. the aat3125 is guaranteed to meet performance specifications over the -40c to +85c operating temperature range and is assu red by design, characterization, and correlation with statistical process controls.
aat3125 usb otg 5v charge pump 6 3125.2005.12.1.4 typical characteristics unless otherwise noted, v in = 3.5v, c in = c out = c 1 = c 2 = 1f, t a = 25c. charge pump output voltage vs. input voltage (i load = 100ma) 0 1 2 3 4 5 6 012345 input voltage (v) output voltage (v) charge pump output voltage vs. load current 4.5 4.7 4.9 5.1 5.3 5.5 1 10 100 1000 load current (ma) charge pump output voltage (v) v in = 3.9v v in = 3.7v load transient response (10ma to 100ma) time (4ms/div) v out (100mv/div) charge pump waveforms (100ma load) time (1 s/div) v (10mv/div) in out efficiency vs. load current 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 load current (ma) efficiency (%) v in = 3.8v v in = 3.4v charge pump on/off timing time (2ms/div) out (1v/div) iin (100ma/div) en (1v/div)
aat3125 usb otg 5v charge pump 3125.2005.12.1.4 7 typical characteristics unless otherwise noted, v in = 3.5v, c in = c out = c 1 = c 2 = 1f, t a = 25c. charge pump pok timing time (100 s/div) out (5v/div) en (2v/div) pok2 (5v/div) pok1 (5v/div) sesdet (5v/div) srrdy (5v/div) i sr vs. v out (en = 1; sr = 1) 5 10 15 01234 output voltage (v) i sr (ma) v in = 4.2v v in = 3.2v i ccout vs. v out 0 1 2 3 4 5 6 7 8 9 10 0 123456 output voltage (v) i ccout ( a) shutdown current vs. input voltage (en = 0; sr = 1) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 123456 input voltage (v) i cc1 ( a) operating current vs. input voltage (en = 1; sr = 0; outside current source mode) 0 10 20 30 40 50 60 70 80 012345 input voltage (v) i cc3 ( a) operating current vs. input voltage (en = 1; sr = 0; charge pump mode) 0.000 0.200 0.400 0.600 0.800 1.000 1.200 0123456 input voltage (v) i cc2 (ma)
aat3125 usb otg 5v charge pump 8 3125.2005.12.1.4 typical characteristics unless otherwise noted, v in = 3.5v, c in = c out = c 1 = c 2 = 1f, t a = 25c. v bus pulsing for srp (v bus rise time; 100 f on v bus ) time (10ms/div) v bus (v) 0 1 2 3 4 v bus pulsing for srp (v bus rise time; 5 f on v bus ) time (1ms/div) v bus (v) 0 1 2 3 4 rising sesdet, srrdy timing (120 f load) time (10ms/div) out (5v/div) en, sr (5v/div) sesdet (5v/div) srrdy (5v/div) falling sesdet timing time (100ms/div) out (5v/div) en/sr (5v/div) sesdet (5v/div)
aat3125 usb otg 5v charge pump 3125.2005.12.1.4 9 functional block diagram voltage reference control uvlo otmp in pok1 gnd sr outcp 10ma en 4.0 pok2 4.4 sesdet 2.0 srrdy 0.6 5v charge pump c1+ c1- c2+ c2- out oc functional description charge pump the aat3125 charge pump uses a 1.5x topology; the two flying capacitors are charged in series and discharged in parallel. using this topology, output current is approximately 2/3 input current. since the power bus in battery-operated devices that use a single cell lithium-ion/polymer battery ranges from 3v to 4.5v, an output voltage above 4.4v can be maintained. output voltage is regulated to 5v and output current is limited by the value of r cs . the charge pump is designed to operate safely with any combination of input and output voltages. current is not allowed to flow from out to in. 10ma current source a 10ma current source supplies current to out for v bus pulsing during srp. during v bus pulsing, the length of time needed to charge capacitance con- nected to out distinguishes between non-srp capable devices and srp capable devices. using 10ma, sesdet should rise about 7ms after srrdy rises when an otg device is connected. with a non-otg device connected, this period is at least 70ms. 10ma should not damage non-srp capable hosts that allow reverse current flow from the bus. current is not allowed to flow from out to in through the current source. sesdet micropower voltage detector the sesdet open drain output signals the use of srp while the system is acting as the a device. out powers this detector because the local 5v bus may not be powered when the b device initi- ates srp. since v bus provides no more than 150a to out, the detector consumes only 7a. srrdy voltage detector the srrdy open drain output signals that v bus is ready for srp. srrdy is powered by in and is active as long as in is above the uvlo level. srrdy is true (low) when out is below the srrdy threshold (0.6v nominal). srrdy is false
aat3125 usb otg 5v charge pump 10 3125.2005.12.1.4 (open) when out is above the srrdy threshold or when en is a logic low. upon activation by en, there is no negative glitch that can be mistaken for out below 0.8v. power ok usb otg devices connected as host must main- tain v out above 4.4 volts or report that it is below 4.4 volts. two power ok outputs (pok1 and pok2) provide a window comparison of the v out voltage. the pok1 open drain output is pulled low if v out drops below 4.0v 5%, and the pok2 open drain output is pulled low if v out drops below 4.4v 5%. under-voltage lockout circuits other than the micropower voltage detector (sesdet) require voltage to be present on in. under-voltage lockout guarantees that sufficient voltage is present on in to ensure operation. all functions other than the sesdet flag are disabled if the voltage on in is less than 2v. discharge resistor in accordance with the usb otg specification, a pull-down resistor is provided to discharge v bus at a current of not more than 8ma. over-temperature protection if the aat3125 junction temperature exceeds 125c, the charge pump is shut down.
ordering information package information qfn44-16 all dimensions in millimeters. 4.000 0.050 pin 1 dot by marking 2.400 0.050 0.600 0.050 4.000 0.050 2.280 ref 0.650 bsc 0.900 0.050 pin 1 identification r0.030max 1 4 5 8 9 13 16 0.450 0.050 0.0125 0.0125 0.203 0.025 0.330 0.050 top view bottom view side view all analogictech products are offered in pb-free packaging. the term ?pb-free? means semiconductor products that are in compliance with current rohs standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. for more information, please visit our website at http://www.analogictech.com/pbfree. package marking 1 part number (tape and reel) 2 qfn44-16 itxyy AAT3125ISN-T1 aat3125 usb otg 5v charge pump 3125.2005.12.1.4 11 1. xyy = assembly and date code. 2. sample stock is generally held on part numbers listed in bold .
aat3125 usb otg 5v charge pump 12 3125.2005.12.1.4 advanced analogic technologies, inc. 830 e. arques avenue, sunnyvale, ca 94085 phone (408) 737-4600 fax (408) 737-4611 ? advanced analogic technologies, inc. analogictech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an analogictech pr oduct. no circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. analogictech reserves the right to make changes to their products or specifi cations or to discontinue any product or service without notice. customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information b eing relied on is current and complete. all products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warran ty, patent infringement, and limitation of liability. analogictech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with anal ogictech?s standard warranty. testing and other quality con- trol techniques are utilized to the extent analogictech deems necessary to support this warranty. specific testing of all param eters of each device is not necessarily performed.

▲Up To Search▲

Price & Availability of AAT3125ISN-T1

	To Download AAT3125ISN-T1 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .