TA8161F | DigiCamel IC Datasheet

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TA8161F TOSHIBA | Alldatasheet

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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC DC/DC CONVERTER SYSTEM IC FOR POWER SUPPLY The TA8161F is a DC/DC converter system IC, which is developed for supplying a voltage (for 2.5V or 5V) for CMOS IC etc. It is especially suitable for low voltage operation, and for power supply and back-up of speech recording / playback LSIs, with only one or two dry batteries. SV FEATURES Neer @ Output voltage can be switched over to 2.5V or 5V TY Ly (WoraY mode (by one dry-battery) VY Vo =5V mode (by one or two dry-batteries) @ Built-in backup mode with a very low power dissipation Vec=1.2V, Ta=25°C, lo =0 SSOP10-P-225-1.00 @ Built-in mode switch (Back up mode/Power supply mode) © Excellent power efficiency, by blocking oscillation @ Output current (Vcc =1.2V, Ta =25°C) ©@ Operating supply voltage range (Ta = 25°C) Vcc2 (opr) =9.9~4V (Vo =5V mode) VEC1 (opr) =0.9~2.2V (Vo =2.5V mode) BLOCK DIAGRAM Vo ? i 3'¢ Veco | ot is teh ey Ono Pow Onn Onn ones Sw 9 2610016802 malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook 1997-07-07 1/8

| No. | NAME Mode switch 1 |MODE sw [ vc : Power supply mode do vee GND/open: Back up mode Current driver This terminal can be used for current driver, because it is synchronized with mode switch. Aashneinenan - - S g MODE sw DRV In case that this circuit isn’t used, this terminal a FS should be connected with SWg2 (Pin®) terminal, as a result low voltage operation is improved. ) Ovo sWa Change-over switch of output voltage. Hf) * | sie [ve | Ze | 5Vvmode_ | Open swe | [2.5V mode ©

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9 Fhe products described in tis document are subject to foreign exchange and foreign trade control laws

The information contained herein is presented only as a guide for the applications ‘of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. @ The information contained herein is subject to change without notice 8997-07-07 2/8

MODE EXPLANATION CURRENT DRIVER Ic MODE Pin® Power Supply Mode [vec [| on Vo =2.5V 0=2.5) FRc Up Mode Snort Vo=5V Power Supply Mode [vec SO] SCN Back Up Mode Open/GND 2. OPERATION OF BACK UP MODE *e OOPS TH UH) In case of back up mode, this IC is operated by blocking LAS wo oscillation. This operation is described as follows. H ' ' ' H ' (1) When potential of output Vo reaches VTH (1), the 4 it Lt t Vo control circuit in the IC starts the converter Vt tt 4 circuit. Power supply (2) When the converter is started, the capacitor C stop connected with Vo terminal is charged and when t Vo reaches VT} (H), the converter is stopped. Vo (3) | The charge of the capacitor C is consumed gradually @® " by load current and comes close to VTH (L)- “| x This IC is performs the blocking oscillation by repeating (1)~(3) above. The frequency of this blocking oscillation depends on load current and a capacitor connected with Vo terminal. 3. MODE SW It is necessary to connect an external pull-down resistor with the terminal of MODE SW (pin@), in case that this IC operates in power supply mode due to external noise etc, even though this IC is back up mode. 4. CURRENT DRIVER TERMINAL In case that current driver terminal (pin@) isn’t used, this terminal should be connected with SWg2 terminal (pin®), as a result low voltage operation is improved. When this terminal is kept open, there is a probability that the MODE SW circuit doesn’t operate normally. 5. RADIATION It is necessary to connect a L/C or R/C filter, in case that output noise is large due to radiation etc. Because this IC has adopted a converter circuit of flyback system. 6. Vo and Vcc Supply voltage should not be high than output voltage, because this IC is boost type DC/DC converter. 1997-07-07 3/8

3 Quiescent Supply Current Cipua | lp 2 : b, Io=0 [=| 30) — | uA

8 JOSC stop Output Voltage 2] Vry22 | Wa : Ps lo=0 a"

OSC Transistor Saturation Vcc =0.9V, SW3:b Voltage VDRV |—[» [iccnoev.§ 150 | mv = Power Supply Mode On hooeanad sW2 :¢ yA a Current Vo1=2V, Vpgv=50mv 8 Vcc =0.9V, SW2:d |Back Up Mode On Voltage | Vmode SW3:b 0.3 Vv Vprv=0.8V 1997-07-07 4/8

TEST L(uH) [Qo | TURN WIRE FREQUENCY (mms) REFERENCE SUMIDA ELECTRIC Co., Ltd, ® 36 © (Bottom of view) TEST CIRCUIT Q w bc SS Fy © = id) ° J (@) zt 52 L_@y move sw Vo $0 Vo 102) gw, ts oo (2) vav osc @) i (a)? 3'¢ oo tg ai 1 | & 2—G) sa vec ® © vee 3 (ai wfe ° i Sts +4) War no @) a 7é t (b) LG) swer 2O (a) TTT T957.07-07_ 578

Unless otherwise specified Vcc = 1.2V, Ta=25°C, Ig =0 Iecqi - Vcc Iecq2 - Vcc z Vo =5V mode z Vo =2.5V mode & Io=0 & Io=0 = 08 s 2 2 6 6 04 [I 2 2 | = og Ea N | 3 3 E \\ z 2 2 02) Et NET PELE § od Ne 8 5 5 Oo” 1 2 3 4 1 1S 2 25 SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE Vcc (V) Vo1 - !o1 Vo2 - !02 CLL ne] COLT ome] = LYN EAL “CET TT TT TTT | : FARREEEAE TUIN TATA | Bg 48 1 w 24 en ee 2 |] | \\| | 3 5 Vec=1V -— Vec=1.2V Vec=1.5V eee ei l |_| 5 46 i 5 22 Bem pens | | fT ett Rita tia * AIEEE so 4a 20 eivsry | | TT TT t1 1 1 i tty tT | 0 10 20 30 40 50 0 10 15 20 25 30 OUTPUT CURRENT Ig, (mA) OUTPUT CURRENT [92 (mA) Vo1 - Vcc Vo2 - Vcc ot _PEP ttt ty aot TT ttt yy ~ ELT ETT yy = Lif tp ey eat LET TTT ET ef ET TTT TT I Bo 4s w 20 e Lie yet yyy 2 Lilt ety yyy eat tT TT tT e ttt tty yt yt eT e “TTT TTT TTT * COT ° 3.5) ° 1.0) ° © pi it | | terse oe 0 1 2 3 4 5 0 1 15 2 25 SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE Vcc (V) 1997-07-07 6/8

Ice 7 - 101 Ice, 7 - 102 129) az (\\———~ f 25 38 7 i ee U Z| B Va eS mS S540 Sr ag |

22 A 22 A

Evi tt txt i | i | tT 0 4 8 12 14 0 5 10 15 20 OUTPUT CURRENT Ig} (mA) OUTPUT CURRENT I2 (mA) Iccq - Ta Afosc - Ta cy +40, ce [vcr] | TTT TT Ty @ | | | tt i oe ee va 8 os} <I S +20 Ss : H peat tH » LLP eee Fa — = s a et Pe) , | ar | . ie] Vo=5V mode e PTT | 3 Ait | |

2 LL | | vorzevmese [TTT f tel tit

3 =25V mode 2 5 02 [| E i» | ge LE Erp yet E LLL] ees Ea § Vo =2.5V mode : fosc = 1MHz a Bag | | | vonsv nose: tenon g - -20 0 20 40 60 80 -20 0 20 40 60 80 AMBIENT TEMPERATURE Ta (°C) AMBIENT TEMPERATURE Ta (°C) Vo1 - Ta Vo2 - Ta 6.0) 3.5) PTET TTY vos mat LTT Tt TT J vena nose ae ae a 55 30) = lo=5ma x lo=t0ma s {ti} ity ie s LET ttyl fee i gf Poe | rf = Fs al s {ti} | eee g [fi] ft | eA ett ttt tty 2 ttt tT tty Eas 5 20 ee Oe es wt tT TET yyy Ty w-EEE TET TT TT -20 0 20 40 60 80 -20 0 20 40 60 80 AMBIENT TEMPERATURE Ta ((C) AMBIENT TEMPERATURE Ta ((C) 1997-07-07 7/8

SSOP10-P-225-1.00 Unit : mm 10 6 HHHHH 2 ony Aye 4 & re tl oo Nu O.6TYP 440.1 5.7MAX 5.2+0.2 a x 3 aT & a eP s 0.52540.2 Weight : 0.09g (Typ.) see «47-07-07 8/8

Product Information

TA8161F specifications and overview.

Summary

DC/DC CONVERTER SYSTEM IC FOR POWER SUPPLY

Description

DC/DC CONVERTER SYSTEM IC FOR POWER SUPPLY

Source title TA8161F Datasheet(PDF) - Toshiba Semiconductor

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