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this is information on a product in full production. september 2012 doc id 16757 rev 3 1/26 26 stcf07 high power buck-boost white led driver datasheet ? production data features buck-boost dc-dc converter drives one power led up to 1 a in flash mode drives one power led up to 800 ma in continuous mode led temperature protection output current control 1.8 mhz (typ.) fixed frequency pwm synchronous rectification high efficiency across the total input voltage range operational modes: ? shutdown mode ? high current mode: up to 1 a ? low current mode: from 20 ma adjustable current in both modes peak inductor limited to 2.3 a (typ.) led disconnected from the battery in shutdown mode ntc led temperature protection overvoltage protection: 5.3 v short-circuit protection overtemperature protection ulvlo function 1 a max shutdown current qfn16 (4 x 4 x 1 mm) 16 leads applications camera flash for mobile phones power supply for high power leds description the stcf07 is a dedicated, size-optimized solution for driving a power led. the device is a buck-boost converter which guarantees proper led current control over all possible battery voltage and led forward voltage conditions. the output current control ensures good current regulation over the forward voltage spread characteristics of high-brightness leds. the device includes various functions to protect the chip and the power leds. these include soft-start control as well as detection and protection of chip overtemperature and shorted leds. an optional external ntc is supported to protect the leds against overheating. it is possible to separately program the current intensity in high and low mode using the sel pin. the device is housed in a 16-lead qfn16 (4 x 4 mm) package with a height less than 1 mm. qfn16 (4 x 4 mm) table 1. device summary order code package packaging STCF07PNR qfn16 (4 x 4 mm) tape and reel www.st.com
contents stcf07 2/26 doc id 16757 rev 3 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 logic pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.1 csel pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.2 fault pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7.3 enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.1 buck-boost converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.2 high current mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.3 low current mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.4 shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.5 soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.6 stcf07 protection features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8.6.1 peak current and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . 13 8.6.2 overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8.6.3 thermal shutdown protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8.6.4 sensing of led temperature with the ntc resistor . . . . . . . . . . . . . . . . 13 8.6.5 undervoltage lockout function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 9 pcb design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9.1 pcb design rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9.2 pcb design of the demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . 16 9.3 schematic of the demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
stcf07 contents doc id 16757 rev 3 3/26 10 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 11 external component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 11.1 input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 11.2 inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 11.3 led selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 11.4 rhc selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 11.5 rlc selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 11.6 ntc and rx resistor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 12 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 13 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
block diagram stcf07 4/26 doc id 16757 rev 3 1 block diagram figure 1. stcf07 block diagram current protection logic osc mx soft start over temp bandgap ref ref driver ntc control pvbat vbat enable csel fault gnd vlx2 vlx1a vlx1b vout fb1 fb2 fb2s pngd rx ntc current protection logic osc mx soft start over temp bandgap ref ref driver ntc control pvbat vbat enable csel fault gnd vlx2 vlx1a vlx1b vout fb1 fb2 fb2s pngd rx ntc
stcf07 pin configuration doc id 16757 rev 3 5/26 2 pin configuration figure 2. stcf07 pin connections (top view) table 2. stcf07 pin description pin n symbol description 1 vlx2 inductor vlx2 connection 8rxr x resistor connection 2 ntc ntc resistor connection 3 vout output voltage 4 fb1 feedback pin [i led *(r hc +r lc )] 5fb2r tr bypass 6 fb2s feedback pin [i led *r hc ] 14 gnd signal ground 13 csel current selection 7enenable 16 fault diagnostic 9 pvbat power supply voltage 10 vbat supply voltage 11 vlx1a inductor vlx1 connection 12 vlx1b inductor vlx1 connection 15 pgnd power ground exposed pad pgnd to be connected to the pcb ground plane for optimal electrical and thermal performance
maximum ratings stcf07 6/26 doc id 16757 rev 3 3 maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. table 3. absolute maximum ratings symbol parameter value unit vbat signal supply voltage -0.3 to 6 v pvbat power supply voltage -0.3 to 6 v vlx1a, vlx1b inductor connection 1 -0.3 to v i +0.3 v vlx2 inductor connection 2 -0.3 to v i +0.3 v vout output voltage -0.3 to 6 v fb1, fb2, fb2s feedback and sense voltage -0.3 to 3 v r x connection for reference resistor -0.3 to 3 v csel current selection -0.3 to v i +0.3 v en enable -0.3 to v i +0.3 v fault diagnostic -0.3 to v i +0.3 v ntc connection for led temperature sensing -0.3 to 3 v esd human body model 2kv p tot continuous power dissipation (at t a = 70 c) 800 mw t op operating junction temperature range -40 to 85 c t j junction temperature -40 to 150 c t stg storage temperature range -65 to 150 c table 4. thermal data symbol parameter value unit r thja (1) thermal resistance junction-ambient 31 c/w 1. junction-to-ambient thermal resistance in jedec still air chamber. thermal test board jesd51-7 (leaded surface mount packages).
stcf07 application information doc id 16757 rev 3 7/26 4 application information note: represents a typical application schematic for an output current of 800 ma (max) in continuous mode operation. for pulse/flash mode operation it is possible to increase the maximum output current up to 1 a. if the battery voltage is higher than 3.1 v, the chip is capable of delivering the maximum output current of up to 1 a in continuos mode. note: the above-listed external components refer to a typical application. operation of the stcf07 is not limited to the use of these components. figure 3. application schematic diagram vbat pvbat enable csel fault vlx1 vlx1 ntc fb1 fb2 fb2s vout gnd pgnd c in r hc r lc led ntc vlx2 rx r x c out optional components v in l vbat pvbat enable csel fault vlx1 vlx1 ntc fb1 fb2 fb2s vout gnd pgnd c in r hc r lc led ntc vlx2 rx r x c out optional components v in l table 5. list of external components component manufacturer part number value size r hc welwyn lr1206-r20fi (1) 0.2 1206 koa sr732bttdr160f (2) 0.16 1206 r lc tyco electronics crl1220t1r8j 1.8 0805 c in tdk c1608x5r0j106mt 10 f 0603 c out tdk c1608x5r0j475m 4.7 f 0603 ltdk vlf4014st-2r2m1r9 (1) 2.2 h / 1.4 a 3.5x3.8x1.4 mm vlf5014s-2r2m2r3 (2) 2.2 h / 2.3 a 4.6x4.8x1.4 mm ntc murata ncp18wf104j03rb 100 k 0805 r x tyco electronics 1-1879132-9 15 k 0402 led luxeon lxhl_pw09 1. for 800 ma output current performance. 2. for 1000 ma output current performance.
electrical characteristics stcf07 8/26 doc id 16757 rev 3 5 electrical characteristics t a = 25 c, v i = 3.6 v, 2 x c i = 10 f, c o = 1 f, l = 2.2 h, r hc = 0.22 , r lc = 1.8 , r x = 15 k table 6. electrical characteristics symbol parameter test conditions min. typ. max. unit v i input voltage supply 2.7 5.5 v uvlo undervoltage lockout v i = 2.7 v 2.2 v v pw_onreset power on reset threshold v i rising 2.3 v i o output current - high current level csel = v i ; v i = 2.7 v to 5.5 v; r hc = 0.16 , p out = 3.4 w 1000 ma output current - high current level csel = v i ; v i = 3.2 v to 5.5 v; r hc = 0.16 , p out = 4 w 1000 output current - low current level csel = gnd; v i = 3.3 v to 5.5 v; r hc + r lc ~ 2 20 v out regulated voltage range 2.5 5.3 v ilim inductor peak current v i = 2.7 v, v out shorted during operation 2.3 a fb1 feedback voltage low current (csel = 0 v) 152 160 168 mv fb2 feedback voltage high current (csel = v i ) 152 160 168 mv r on_ fb1-fb2 on resistance high current (csel = v i ) i o = 800 ma 90 m i q quiescent current in shutdown mode en = gnd 1 a quiescent current in high current mode en = v i ; csel = v i ; v i = 3.3 v to 5.5 v; r hc = 0.22 1.8 ma f s frequency v i = 2.7 v 1.8 mhz n efficiency v i = 3.2 to 4.2 v, i o = 800 ma 85 % ovp output overvoltage protection v i = 5.5 v, no load 5.5 v ov hyst overvoltage hysteresis v i = 5.5 v, no load 0.3 v otp overvoltage protection v i = 5.5 v 140 c ot hyst overvoltage hysteresis v i = 5.5 v 20 c v ntc ntc voltage reference v i = 2.7 v to 5.5 v 1.8 v v rx ntc voltage threshold i ntc = 1 ma max 1.2 v ntc leak rx-ntc switch off leakage shutdown mode, v ntc = 2 v - v rx = gnd 1a v il input logic signal level csel, en v i = 2.7 v to 5.5 v 00.4 v v ih 1.4 3
stcf07 electrical characteristics doc id 16757 rev 3 9/26 symbol parameter test conditions min. typ. max. unit fault low level voltage i sink = 5 ma 0.2 0.5 v leakage current v fault = 5 v 1 a t on led current rise time i led = 0 to i led = max 2ms table 6. electrical characteristics (continued)
introduction stcf07 10/26 doc id 16757 rev 3 6 introduction the stcf07 is a buck-boost converter designed to power and control the current of a power white led. the device operates at a constant switching frequency of 1.8 mhz (typ). it provides an output voltage from 2.5 v up to 5.3 v, from a 2.7 v to 5.5 v supply voltage. this supply range allows the device to operate from a single-cell lithium-ion battery. the current is adjustable up to 1 a for an input voltage ranging from 2.7 v to 5.5 v and maximum output power up to 3.4 w. when the battery voltage is higher than 3.2 v, it is possible to increase the output power up to 4 w. the device uses an external ntc resistor to sense the temperature of the white led. this function may not be needed in all applications, and in these cases the relevant external components can be omitted.
stcf07 logic pin description doc id 16757 rev 3 11/26 7 logic pin description 7.1 csel pin this input pin allows the setting of two different levels of current. when the voltage on this pin is low, the internal multiplexer switches the feedback to the fb1 pin, which is the dedicated feedback pin for low current operation. when the voltage on the csel pin is high, the internal multiplexer switches the feedback to the fb2s pin, and enables the shorting transistor connected between the fb1 and fb2 pins. the feedback voltage is sensed directly on the sensing r hc by the connection of fb2s. this sensing pin is dedicated to high current operation. 7.2 fault pin when the stcf07 is in on mode (en is high), the device is able to detect disconnection or failure of the led. this information can be used by the system to signal that a problem has occurred in the leds. 7.3 enable pin this pin functions as an enable input. no internal pull-up or pull-down is provided.
detailed description stcf07 12/26 doc id 16757 rev 3 8 detailed description 8.1 buck-boost converter the regulation of the pwm controller is done by sensing the current of the led through r lc or r lc + r hc , depending on the csel voltage. depending of the forward voltage of the flash led, the device can automatically change between buck (step-down) and boost (step- up) mode: ? boost region = v out > v bat : this configuration is used in most cases, as the output voltage (v out = v f + i led x r sense ) is higher than v bat ? buck region = v out < v bat ? buck / boost region = v out ~ v in 8.2 high current mode enable = csel = v bat the stcf07 operates continuously to supply maximum current to the led up to 800 ma in high current mode. if high current mode is used in flash applications, then it is possible to increase the led current up to 1066 ma. the current can be adjusted with the r hc resistor. the current is then programmed at: i hc = 160 mv / r hc for a current programmed at 800 ma, the sensing resistor is equal to 0.20 . 8.3 low current mode enable = vbat, csel = 0 the stcf07 can continuously provide an adjustable current starting from 20 ma in low current mode. the current adjustment is done with resistor r lc . the current is then programmed at: i lc = 160 mv / (r hc + r lc ) the ntc divider for measurement of the led temperature is active. 8.4 shutdown mode enable = 0 when the device is not used, it can be put in shutdown mode, which reduces the quiescent current to 1 a. the ntc protection in this mode is not active. 8.5 soft-start to avoid spikes on the battery during the startup sequence, a soft-start function has been implemented. the soft-start function is achieved by progressively increasing the feedback voltage reference. in worst-case conditions, the startup time, as defined below (i out = i max ), does not exceed 2 ms.
stcf07 detailed description doc id 16757 rev 3 13/26 8.6 stcf07 protection features 8.6.1 peak current and s hort-circuit protection when the peak inductor current exceeds the maximum switch peak current limit of 2.3 a, the pwm controller turns off and is enabled at the next oscillation period. 8.6.2 overvoltage protection the device includes power failure protection, which stops the operation of the pwm controller when the voltage at the pin v out exceeds the ovp threshold. when the voltage on pin v out is reduced by ov hyst , the operation of the controller recovers automatically. 8.6.3 thermal shutdown protection internal thermal shutdown protection switches off the device when the junction temperature exceeds 140 c (typ). the hysteresis comparator allows the pwm controller to restart automatically when the temperature is reduced to 120 c. 8.6.4 sensing of led temperature with the ntc resistor the device is capable of switching off the power circuit when a high temperature on the led is detected. (see figure 5 ). if the sensing led temperature feature is not used, ntc pin must be left floating and rx pin must be grounded. figure 4. startup: led current rise time t on < 2 ms enable i out i led t on < 2 ms enable i out i led
detailed description stcf07 14/26 doc id 16757 rev 3 8.6.5 undervoltage lockout function if the device is on and the battery voltage is as low as 2.2 v, the device goes into a fault state and the fault pin is put to low. to restart the device, the enable pin must be reset low and high. figure 5. typical led temperature sensing application with the ntc resistor v ref = 1.2 v ntc r ntc = 100 k vref = 1.8 v r x = 15 k v ref = 1.2 v ntc r ntc = 100 k vref = 1.8 v r x = 15 k
stcf07 pcb design doc id 16757 rev 3 15/26 9 pcb design 9.1 pcb design rules the stcf07 is a powerful switched device, so the pcb must be designed following the rules for designing switched supplies. it is recommended to use at least a two-layer pcb. the power wiring must be as short and wide as possible, due to the high current. all external components should be placed close to the stcf07. high-energy switched loops should be as small as possible to reduce emi. most leds require cooling, which may be implemented by a defined copper area on the pcb. use the reference guide for each led to design the heatsink. place the r flash resistor as close as possible to pins 5 and 6. when a change of pcb layer is required, the number of vias must be sufficient. place the ntc resistor as close as possible to the led for good temperature sensing. direct connection of gnd and pgnd is needed to achieve accurate output current values. the led current should not flow through this track. sensing of the voltage on the r flash resistor must be done by connecting a wire directly from pin 6 to the r flash resistor; no current flows through this track. pins 5 and 6 must be connected to the pin of the r flash resistor. the exposed pad must be connected to the pgnd, with a track as wide as possible. it is recommended to place the copper plate, connected through the vias to the exposed pad, on the bottom layer to create a heatsink for the device. it is further recommended that the copper plate used be as large as possible to achieve optimal thermal performance.
pcb design stcf07 16/26 doc id 16757 rev 3 9.2 pcb design of the demonstration board figure 6. top layer figure 7. bottom layer
stcf07 pcb design doc id 16757 rev 3 17/26 figure 8. top overlay
pcb design stcf07 18/26 doc id 16757 rev 3 9.3 schematic of the demonstration board figure 9. schematic diagram of the stcf07 demonstration board
stcf07 typical performance characteristics doc id 16757 rev 3 19/26 10 typical performance characteristics figure 10. i out 80 ma vs. v in figure 11. i out 800 ma vs. v in figure 12. efficiency vs. v in figure 13. efficiency vs. v in , i o = 400 ma figure 14. line transient v step = 600 mvpp, t r = 10 s, t f = 10 s, v in = 3.6 v to 4.2 v 50.000 55.000 60.000 65.000 70.000 75.000 80.000 85.000 90.000 95.000 100.000 2.50 3.00 3.50 4.00 4.50 5.00 5.50 input voltage [v] output current [ma] 25 c - 40 c 85c 50.000 55.000 60.000 65.000 70.000 75.000 80.000 85.000 90.000 95.000 100.000 2.50 3.00 3.50 4.00 4.50 5.00 5.50 input voltage [v] output current [ma] 25 c - 40 c 85c 500.000 550.000 600.000 650.000 700.000 750.000 800.000 850.000 900.000 950.000 1000.000 2.50 3.00 3.50 4.00 4.50 5.00 5.50 input voltage [v] output current [ma] 25 c -40 c 85 c 500.000 550.000 600.000 650.000 700.000 750.000 800.000 850.000 900.000 950.000 1000.000 2.50 3.00 3.50 4.00 4.50 5.00 5.50 input voltage [v] output current [ma] 25 c -40 c 85 c 50 55 60 65 70 75 80 85 90 95 100 2.53 3.54 4.555.5 input voltage [v] efficiency [%] 800 ma 400 ma 50 55 60 65 70 75 80 85 90 95 100 2.53 3.54 4.555.5 input voltage [v] efficiency [%] 800 ma 400 ma 50 55 60 65 70 75 80 85 90 95 100 2.5 3 3.5 4 4.5 5 5.5 input voltage [v] efficiency [%] -40c 25c 85c 50 55 60 65 70 75 80 85 90 95 100 2.5 3 3.5 4 4.5 5 5.5 input voltage [v] efficiency [%] -40c 25c 85c
external component selection stcf07 20/26 doc id 16757 rev 3 11 external component selection 11.1 input and output capacitor selection for input and output capacitors it is recommended to use ceramic capacitors with low esr. for good device stability when supplied by a low input voltage of 2.7 v at maximum ratings, it is recommended to use 10 f / 6.3 v as a minimum value for the input capacitor, and 4.7 f / 6.3 v as a minimum value for the output capacitor. note: see recommended components in table 5 on page 7 . 11.2 inductor selection a thick, shielded inductor with low dc series wiring resistance is recommended for this application. for good efficiency, it is recommended to use an inductor with a series dc resistance of r dcl < r d / 10, where r d is the dynamic resistance of the led. for nominal operation, the peak inductor current can be calculated using the formula: i peak = {(i out / ) + [(v out - v in ) x v in 2) / (2 x l x f x v out 2)]} x v out / v in where: i peak = peak inductor current i out = current sourced at pin v out = efficiency of the stcf07 v out = output voltage at pin v out v in = input voltage at pin v in l = inductance value of the inductor f = switching frequency note: see recommended components in table 5 on page 7 . 11.3 led selection all leds with forward voltages from 2.7 v to 5 v are suitable for use with stcf07 device. the led forward voltage must include the voltage spread of this value. it is possible to set the led current in the two different operating modes (high current mode and low current mode) through two external sensing resistors. note: see recommended components in table 5 on page 7 . 11.4 r hc selection the r hc resistor value can be calculated using equations r hc = 160 mv / i hc and p rhc = r hc * i hc 2 , where p rhc is the dissipated power on the r hc resistor. it is recommended to use a 1206 package size thin metal film resistor with 1% or 5% maximum tolerance. the maximum high led current for the stcf07 device is 800 ma with a battery voltage range 2.7 v to 5.5 v.
stcf07 external component selection doc id 16757 rev 3 21/26 11.5 r lc selection r lc resistor value can be calculated with the following equations: r lc = (160 mv - i lc * r hc ) / i lc and p rlc = r lc * i lc 2 where p rlc is the dissipated power on the r lc resistor. it is recommended to use a thin metal film resistor with a 1% or 5% tolerance. 11.6 ntc and r x resistor selection the ntc resistor for sensing led temperature and the r x resistor create a voltage divider. the output of this divider is compared with the 1.192 v internal voltage reference. when voltage on the output of the voltage divider is increased over the reference, the logic switches off the power circuit. voltage divider is possible to supply from the ntc pin, where is output of the 1.8 v internal reference.
package mechanical data stcf07 22/26 doc id 16757 rev 3 12 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
stcf07 package mechanical data doc id 16757 rev 3 23/26 dim. mm. inch. min. typ. max. min. typ. max. a0. 8 00. 9 0 1.00 3 1.5 3 5.4 39 .4 a1 0.02 0.05 0. 8 2.0 a2 0.65 1.00 25.6 39 .4 a 3 0.20 7. 9 b 0.1 8 0.25 0. 3 07.1 9 . 8 11. 8 d 3 . 8 5 4.00 4.15 151.6 157.5 16 3 .4 d2 2.10 2.60 8 2.7 102.4 e 3 . 8 5 4.00 4.15 151.6 157.5 16 3 .4 e2 2.10 2.60 8 2.7 102.4 e 0.50 1 9 .7 l0. 3 0 0.40 0.50 11. 8 15.7 1 9 .7 ddd 0.0 83 .1 qfn16 (4 x 4) mechanical data 765 33 21a
package mechanical data stcf07 24/26 doc id 16757 rev 3 dim. mm. inch. min. typ. max. min. typ. max. a 33 0 12. 99 2 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n 99 101 3 . 898 3 . 9 76 t 14.4 0.567 ao 4. 3 5 0.171 bo 4. 3 5 0.171 ko 1.1 0.04 3 po 4 0.157 p 8 0. 3 15 tape & reel qfnxx/dfnxx (4x4) mechanical data
stcf07 revision history doc id 16757 rev 3 25/26 13 revision history table 7. document revision history date revision changes 18-nov-2009 1 first release. 12-apr-2011 2 updated table 5 on page 7 . 10-sep-2012 3 modified: chapter 8.6.4 on page 13 .
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