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technical manual power supply ic s1f7760x series f mf1563 - 02
notice no part of this material may be reproduced or duplicated in any form or by any means without the written permission of seiko epson. seiko epson reserves the right to make changes to this material without notice. seiko epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical products. moreover, no license to any intellectual property rights is granted by implication or otherwise, and there is no representation or warranty that anything made in accordance with this material will be free from any patent or copyright infringement of a third party. this material or portions thereof may contain technology or the subject relating to strategic products under the control of the foreign exchange and foreign trade law of japan and may require an export license from the ministry of international trade and industry or other approval from another government agency. all other product names mentioned herein are trademarks and/or registered trademarks of their respective companies. ?seiko epson corporation 2003, all rights reserved.
configuration of product number devices s1 f 77600 y 00a0 00 packing specifications specifications shape (y : sot, m : son) model number model name (f : power supply) product classification (s1:semiconductors)
rev.1.4 epson i contents 1. description ................................................................................................................. ...................1 2. features .................................................................................................................... .....................1 3. list of series product names ...............................................................................................1 4. block diagram ............................................................................................................... ..............2 5. description of block diagram .............................................................................................3 6. package..................................................................................................................... ......................3 6.1 sot89-3pin (s1f7760xy0x000l)..............................................................................................3 6.2 son-6pin (s1f7760xm0x000l)................................................................................................. 4 7. functional description ...................................................................................................... .....5 7.1 outline of operation ....................................................................................................... ............5 8. absolute maximum ratings.................................................................................................... .7 9. electrical characteristics.................................................................................................. 8 9.1 model with detection voltage 1.2v and release voltage 2.0v, nch/pch models .....................8 9.2 model with detection voltage 2.4v and release voltage 2.7v, nch/pch models .....................9 10. external connection diagram ...........................................................................................12 11. examples of circuits ....................................................................................................... .......13
s1f7760x series technical manual rev.1.4 epson 1 1. description s1f77600 series comprises high-accuracy, low-consumption low-voltage detectors which work at a low voltage. output is guaranteed until supply voltage reaches 0v. they are ics used to prevent liquid leakage of a dry cell by detecting the voltage drop of power supply of two cells connected in series. the internal circuits of the ics consist of reference voltage circuits, comparators, resistances for detecting voltage, hysteresis circuits, output-securing circuits (forced output hi-z) and output transistors. detection voltage is of non-adjustment type, fixed inside the ic at high accuracy. output form is selectable from p-ch open drain and n-ch open drain. the package is comprised of sot89-3 pin and son-6 pin (under development). these ics are best suited to the dry-cell liquid leakage prevention/protection circuit of a portable product which uses power supply of two dry cells connected in series. 2. features ? current consumption........................................ max.5.0 a (v dd = 3.0v, p-ch output) max.5.5 a (v dd = 3.0v, n-ch output) ? operational voltage.......................................... 0.8v to 5.5v ? forced output hi-z........................................... 0.0v to 1.0v ? detection voltage ............................................. 1 1.2v to 1.6v (0.05v step: mask option) 2 1.7v to 2.5v (0.1v step: mask option) ? accuracy of voltage detection.......................... 1 3.5% (t a = 25 c, detection voltage 1.2v) 2 2.0% (t a = 25 c, detection voltage 2.4v) ? detection temperature characteristics .............. -320ppm/ c ? hysteresis width............................................... 1 0.2v to 1.0v (0.05v step: mask option) 2 0.12v to 0.3v (0.02v step: mask option) ? release voltage ................................................ detection voltage + hysteresis width ? accuracy of release voltage ............................. 1 2.5% (t a = 25 c, detection voltage 1.2v) 2 2.0% (t a = 25 c, detection voltage 2.4v) ? release temperature characteristics ................. -260ppm/ c ? operational temperature................................... -30 c to +85 c ? output form...................................................... p-ch open drain, n-ch open drain (mask option) ? shipment form ................................................. sot89-3pin, son-6 pin (under development) the products have no radiation-resistant or light-proof design. 3. list of series product names table 3.1 list of series product names detection voltage [v] release voltage [v] product name min. typ. max. min. typ. max. output form shipment form s1f77600y0a000l sot89-3 s1f77600m0a000l * nch son-6 s1f77601y0a000l sot89-3 s1f77601m0a000l * 1.158 1.200 1.242 1.950 2.000 2.050 pch son-6 s1f77602y0a000l * sot89-3 s1f77602m0a000l * nch son-6 s1f77603y0a000l * sot89-3 S1F77603M0A000L * 2.352 2.400 2.448 2.646 2.700 2.754 pch son-6 * under development (note 1) a lineup of detection voltage and release voltage other than those in the above table is also available.
s1f7760x series technical manual 2 epson rev.1.4 4. block diagram fig.4.1 block diagram v ref v dd v ss out + - (note 3) p-ch open drain output n-ch open drain output (mask option allows you to select either output form.) output securing circuit (note 2) shown is the case of a model with detection voltage 1.2vand hysteresis width 0.8v detection:1.2v release: 2.0v forced output hi-z if supply voltage is 1.0v r1 r2 r3 cmp q1 q2 q3 v reg
s1f7760x series technical manual rev.1.4 epson 3 5. description of block diagram (1) reference voltage: v ref generates reference voltage and reference current required for the inside of ic. (2) comparator cmp compares the divided potentials of resistances connected between power supply (v reg ) with the reference voltage generated inside ic (v ref ). (3) resistances for detecting voltage: r1, r2, r3 divided potential resistances which determine detection and release voltages. either voltage is selectable with aluminum option. (4) hysteresis: q1 a transistor for hysteresis to prevent malfunction (output oscillation, etc.) caused by noise in power supply. (5) output securing circuit forces output pin to output fixed voltage hi-z if ic?s operational voltage drops to the lower limit or lower. (6) output transistors: q2, q3 transistors to output by p-ch open drain (q2) and n-ch open drain (q3). 6. package 6.1 sot89-3pin (s1f7760xy0x000l) pin assignment fig.6.1 sot89-3 pin assignment pin description table 6.1 list of sot89-3 pins pin name i/o pin no. function out o 1 detected-voltage output pin (selectable from p-ch/n-ch open drain) v ss i 2 input voltage pin (negative) v dd i 3 input voltage pin (positive) 1 2 3
s1f7760x series technical manual 4 epson rev.1.4 6.2 son-6pin (s1f7760xm0x000l) pin assignment 1 2 3 6 5 4 top view fig.6.2 son-6 pin assignment pin description table 6.2 list of son-6 pins pin name i/o pin no. function out o 1 voltage detection output pin (pch/nch open drain selectable) v ss i 2 input voltage pin (negative) v dd i 3 input voltage pin (positive) nc - 4 nc pin (normally open) nc - 5 nc pin (normally open) nc - 6 nc pin (normally open)
s1f7760x series technical manual rev.1.4 epson 5 7. functional description 7.1 outline of operation s1f77600 series comprises high-accuracy, low-consumption low-voltage detectors which work at a low voltage. a detector detects voltage by inputting into a comparator the divided potentials of resistances, r1, r2 and r3, connected between power supply (v reg ) and the reference voltage generated inside ic (v ref ). it has hysteresis added to prevent malfunction caused by power supply noise because it can detect difference of potential between v reg and v ref even if the difference is very small. the detection voltage (-v det ), which is found if input voltage drops, and the release voltage (+v det ), which is found if input voltage rises, are defined by the following formulas: detection voltage: -v det = ((r2+r3)/r3) v ref ......................................................(formula 7.1.1) release voltage: +v det = ((r1+r2+r3)/r3) v ref ..................................................(formula 7.1.2) s1f77600 series forces output of fixed voltage hi-z if operational voltage drops to the lower limit or lower. fig.7.1.1 and 7.1.2 show i/o characteristics of p-ch and n-ch open drain outputs, respectively. fig.7.1.1 i/o characteristics of p-ch open drain release voltage (+v det ) detection voltage (-v det ) lower limit of operational voltage vss supply voltage (v dd ) output pch open drain (out) hys width hi-z v ss release voltage (+v det ) detection voltage (-v det ) lower limit of operational voltage
s1f7760x series technical manual 6 epson rev.1.4 fig.7.1.2 i/o characteristics of n-ch open drain (note 4) the i/o characteristics of output p-ch or n-ch open drain shown in each figure above show examples where a pull-down or pull-up resistance is connected to output pin, respectively. release voltage (+v det ) detection voltage (-v det ) lower limit of operational voltage v ss supply voltage (v dd ) output nch open drain (out) hys width hi-z v ss release voltage (+v det ) detection voltage (-v det ) lower limit of operational voltage
s1f7760x series technical manual rev.1.4 epson 7 8. absolute maximum ratings rated values items symbols min. max. units applicable pins remarks input supply voltage v dd -0.3 7.0 v v dd - output voltage v out -0.3 7.0 v out - output current i out - 10 ma out - tolerable loss pd - 200 mw - -30 to +85 c operating temperature t opr -30 85 c - - storage temperature t stg -55 150 c - - soldering temperature and time t sol - 250 10 c s - - (note 5) don?t apply voltage to output pin from outside. (note 6) use of the product under a condition beyond absolute maximum ratings may cause malfunction or permanent failure of the ic. also, it may reduce reliability of the ic greatly, even if the ic works normally just temporally under such condition.
s1f7760x series technical manual 8 epson rev.1.4 9. electrical characteristics 9.1 model with detection voltage 1.2v and release voltage 2.0v, nch/pch models (t a =25c, unless specified otherwise (note 7)) standard values items symbols conditions min. typ. max. units notes operational voltage v dd t a = -30 c to +85 c 0.80 - 5.50 v - detection voltage -v det - 1.158 1.200 1.242 v - release voltage +v det - 1.950 2.000 2.050 v - hysteresis width v hys v hys = (+v det ) - (-v det ) 0.708 0.800 0.892 v - p-ch - 3.00 5.00 a - current consumption 1 i op1 v dd = 3.0v t a = -30 c to +85 c n-ch - 3.50 5.50 a - p-ch - 0.35 0.95 a - current consumption 2 i op2 v dd = 0.7v t a = -30 c to +85 c n-ch - 0.40 1.00 a - p-ch v dd = 3.0v, out = 2.8v 0.30 0.45 - ma - output current i out n-ch v dd = 3.0v, out = 0.2v 0.40 0.55 - ma - p-ch t a = -30 c to +85 c - - 1 ms 9 t phl n-ch t a = -30 c to +85 c - - 1 ms 10 p-ch t a = -30 c to +85 c - - 100 s 9 transfer delay time t plh n-ch t a = -30 c to +85 c - - 100 s 10 temperature characteristics of detection voltage ? -v det ? t opr t a = -30 c to +85 c -560 -320 -200 ppm / c 8 temperature characteristics of release voltage ? +v det ? t opr t a = -30 c to +85 c -470 -260 0 ppm / c 8 (note 7) out pin is open unless specified otherwise. (note 8) temperature characteristics are calculated using the following formula: ? v det / ? t opr = (((v deth - v detl )/v detm )/115) 10 6 v deth : value of detection/release voltage at 85 c v detl : value of detection/release voltage at -30 c v detm : value of detection/release voltage at 25 c
s1f7760x series technical manual rev.1.4 epson 9 9.2 model with detection voltage 2.4v and release voltage 2.7v, nch/pch models (ta=25c, unless specified otherwise (note 7)) standard values items symbols conditions min. typ. max. units notes operational voltage v dd t a = -30 c to +85 c 0.80 - 5.50 v - detection voltage -v det - 2.352 2.400 2.448 v - release voltage +v det - 2.646 2.700 2.754 v - hysteresis width v hys v hys = (+v det ) - (-v det ) 0.198 0.300 0.402 v - p-ch - 3.00 5.00 a - current consumption 1 i op1 v dd = 3.0v t a = -30 c to +85 c n-ch - 3.50 5.50 a - p-ch - 0.35 0.95 a - current consumption 2 i op2 v dd = 0.7v t a = -30 c to +85 c n-ch - 0.40 1.00 a - p-ch v dd = 3.0v, out = 2.8v 0.30 0.45 - ma - output current i out n-ch v dd = 3.0v, out = 0.2v 0.40 0.55 - ma - p-ch t a = -30 c to +85 c - - 1 ms 9 t phl n-ch t a = -30 c to +85 c - - 1 ms 10 p-ch t a = -30 c to +85 c - - 100 s 9 transfer delay time t plh n-ch t a = -30 c to +85 c - - 100 s 10 temperature characteristics of detection voltage ? -v det ? t opr t a = -30 c to +85 c -560 -320 -200 ppm / c 8 temperature characteristics of release voltage ? +v det ? t opr t a = -30 c to +85 c -470 -260 0 ppm / c 8 (note 7) out pin is open unless specified otherwise. (note 8) temperature characteristics are calculated using the following formula: ? v det / ? t opr = (((v deth - v detl )/v detm )/115) 10 6 v deth : value of detection/release voltage at 85 c v detl : value of detection/release voltage at -30 c v detm : value of detection/release voltage at 25 c
s1f7760x series technical manual 10 epson rev.1.4 (note 9) explanatory diagram of measuring transfer delay time this explanatory diagram covers a p-ch open drain output model. v dd t 3.0v 0.7v v ss -v det out t 3.0v v ss v phl v plh +v det 0.35v 1.5v v dd v ss out s1f7760x series 470k ?
s1f7760x series technical manual rev.1.4 epson 11 (note 10) explanatory diagram of measuring transfer delay time this explanatory diagram covers an n-ch open drain output model. v dd t 3.0v 0.7v v ss -v det out t 3.0v v ss v phl v plh +v det 0.35v 0.7v v dd v ss out s1f7760x series 470k ?
s1f7760x series technical manual 12 epson rev.1.4 10. external connection diagram fig.10.1 connection diagram of a p-ch open drain model fig.10.2 connection diagram of an n-ch open drain model v dd v ss out s1f7760x series (1pin) voltage detection output input voltage (+) input voltage (-) (3pin) (2pin) v dd v ss out s1f7760x series (1pin) voltage detection output input voltage (+) input voltage (-) (3pin) (2pin)
s1f7760x series technical manual rev.1.4 epson 13 11. examples of circuits fig.11.1 example of circuit 1 fig.11.2 example of circuit 2 470k ? out ext voltage boost dc/dc v dd v ss v out s1f7760x series n-ch open drain v dd v ss out 470k ? out v dd v ss out s1f7760x series p-ch open drain v dd ce ext v ss v out voltage boost dc/dc
s1f7760x series technical manual 14 epson rev.1.4 fig.11.3 example of circuit 3 (cr timer circuit) 470k ? out s1f7760x series p-ch open drain v dd v ss out v dd
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first issue february, 2003 printed august, 2003 in japan h a epson electronic devices website electronic devices marketing division vv s1f7760x series technical manual

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