FUJITSU SEMICONDUCTOR DATA SHEET m@ DESCRIPTION The MB3802 is a power management switch incorporating two switch circuits with extremely low ON resistance. DS04-27601-1E NO diode is required because the switch block is configured with an N-ch MOS to prevent reverse current at swich OFF. The MB3802 starts at a very low voltage (typical Vin > 2.2V) and a stable ON resistance is obtained irrespective of the switching voltage because the intermal DC/DC converter applies the optimum voltage for the N-ch MOS gate at swith ON. Moreover, the load-side capacitor is discharged at switch OFF, and the power supply for various power supply systems is switched efficiently. m@ FEATURES Extremely low ON resistance: Ron = 0.12Q (typical) Ron = 0.06Q (typical at parallel connection) Reverse current protection at load side at switch OFF Operation start at low input voltage: Vin > 2.2V (typical) Low power consumption At switch OFF: lin (input voltage) = 0 WA, Vin = OV At switch ON: lin = 230 pA, Vin = 5V Load discharge function External control of ON/OFF time Break-before-make operation m@ PACKAGE Plastic SOP, 16 pin (FPT-16P-M04)MB3802 m@ PIN ASSIGNMENT GNDa DCGa SWINa SWINa SWINB SWINB DCGe GNDs (TOP VIEW) O VINA DLYa SWOUTa SWOUTa MB3802 SWOUTs SWOUTs DLYs VINB (FPT-16P-M04) m@ PIN DESCRIPTION (SCSI Interface) Pin No. Pin symbol Description 16 VINA These pins switch ON at High level and OFF at Low level. They serve as power-supply pins for the DC/DC converter to generate 9 VINB the switch gate voltage. 3,4 SWINA Switch Input pins: Two common pins are assigned to SWINa and SWINs. They serve as power-supply pins for the switch-OFF circuit 5,6 SWINB which starts at 1.5V min. 13, 14 SWOUTA Switch output pins: Two common pins are assigned to SWOUTa and SWOUTs. When DCGA and DCGB are High level, the load- 11, 12 SWOUTs discharge circuit starts discharge via these pins. 2 DCGaA SWOUTa/SWOUTB-side discharge control pins: These pins are used to discharge from the load-side capacitor at switch OFF. 7 DCGp Connect them to GND when discharge is not required. Switch-ON/OFF control pins: The ON/OFF time can be delayed 15 DLYa by connecting an external capacitor. Both times are delayed about three fold by installing a 500-pF capacitor between these pins and GND. Leave these pins open when they are not used. 10V may be generated when these pins are open. To keep these pins at high 10 DLYs impedance, take care to mount the device so that no current leaks (less than 0.1 WA). 1 GNDa Ground pins for input threshold reference voltage and load discharge: When two switching circuits are used, ground both 8 GNDs GND pins.MB3802 m@ BLOCK DIAGRAM AND EXTERNAL CONNECTIONS Co | Extemal capacitor DLY Power supply a, O sWin\ \L/ La] Switch-ON Comp circuit Y DC/DC converter TL 4 )} LJ Switch-OFF circuit Sw ou iN Nr r (+) HC) Switch control DDG Load Load discharge circuit uA ( ano 7 Note: The MB3802 incorporates two switch blocks as shown above. However, GND is common to both blocks. BLOCK DESCRIPTION When Vin exceeds 2.2V, the Comp. starts driving the DC/DC converter to switch the N-ch MOS and applies the optimum voltage for the switch gate. The DC/DC converter boosts the Vin voltage. When VIN is below 2.1V, the Comp. stops the DC/DC converter, starts the switch-OFF circuit, and discharges the voltage from the switch gate to GND. The switch-OF F circuit is powered from the SWin and consumes 0.4uA at 5V. Since the N-ch MOS back gate is connected to GND, switch-OFF reverse current is prevented irrespective of the High level state between SWin and SWout. The load discharge circuit installed between SWout and GND is powered by the DCG pin, and discharges the load-side capacitor at switch OFF. When it is not necessary to discharge the load, connect the DCG pin to GND. The DLY pins are for connection to an external capacitor to delay the switch-ON/OFF time. The surge current at the load side is cut at power-on by controlling the switch-ON time. The switch-ON time depends on the boot time of the DC/DC converter. Consequently, when the VIN level is high and the SWin level is low, the switch-ON time is small; when the SWin level is high, the switch-OFF time is small.MB3802 @ ABSOLUTE MAXIMUM RATING (Ta = +25C) Parameter Symbol Condition Ratings Unit Input Voltage VIN _ 0.3 to 7.0 Vv . At switch OFF 0.3 to 7.0 Switching voltage Vsw Vv At switch ON 0.3 to 7.0 Switching current Isw At switch-ON peak 3.6 A Pemissible loss Pb Ta < + 75C 290 mw Strage Temperature TsTG 55 to +125 C m@ RECOMMENDED OPERATING CONDITIONS Ratings Parameter Symbol Conditions - - Unit Min. Typical Max. Input voltage VIN _ _ 6.0 Vv oo. At switch ON _ 6.0 Switching level Vswin Vv At switch OFF _ 6.0 os At switch on Switching current Isw (for single switch) _ _ 1.2 A Gate-pin connection capacitance Cp _ _ _ 10 nF Gate-pin mounting leak current IDLY _ -0.1 _ 0.1 LA Input voltage to load discharge circuit Voce =| VIN = 8V,5V 2.5 _ 6.0 Vv Operating temperature Top 40 _ +7.5 Cm@ ELECTRICAL CHARACTERISTICS 1. DC Characteristics MB3802 (Ta = +25C) Ratings Parameter Symbol Condition - Unit Min Typ Max lin VIN = OV _ 0 _ HA Input current | VIN = 3V _ 100 200 HA IN2 Vin = 5V _ 230 460 HA VIN = 3V, Isw = 0.5A, - . Ron Vewn = 3V _ 120 160 mQ Swiching resistance Va c5V I 5A IN = 5V, Isw = 0.5A, Rone Vswin = 3V _ 130 175 mQ Switch-OFF leak current IL VIN = OV, Vswin = 6V _ 0.5 2.0 HA VTH1 At switch ON 2.0 2.2 2.4 Vv Input threshold voltage VtH2 | At switch OFF 1.9 2.1 2.3 Vv Input hysteresis width Vuys _ 50 100 _ mV . : Vin = 3V, 5V, Isw =0.5A Switch resistance RON Ta = 40 to +75C _ _ 210 mQ Rocet | VswouT = 3V, Voce = 3V _ 750 1500 Q Switch charge resistance Roce2 | Vswout = 5V, Voce = 5V 500 1000 Q Input voltage to switch charge Ince Voce = 5V __ 0 2 uA circuit 2. AC Characteristics (Ta = +25C) - Ratings ; Parameter Symbol Condition - Unit Min Typ Max tont Vin = OV > 3V, Vswin = 3V 100 300 900 us Switch-ON time tone2 Vin = OV > 5V, Vswin = 5V 50 150 450 us tOFFA Vin = 3V > OV, Vswin = 3V 20 60 180 us Switch OFF time tOFF2 Vin = 5V > OV, Vswin = 5V 10 30 150 us ; ; tHYs1 VIN = 3V/ OV, Vswin = 3V 80 240 720 us Switch ON/OFF time lag tHyse | Vin = 5V/ OV, Vswin = 5V 40 120 300 usMB3802 m@ AC CHARACTERISTIC TEST DIAGRAMS 1. Test Condition 7 Open DLY VIN SWIN swouT |'4 @) _|[Vs=3V/5V GND| DCG R Load current=1A Tf TIL ffs Tf TTT R=32/5Q 2. Switch-ON/OFF Timing Chart tr te L~_-+l ! ! Vin ZL 90% ! ! 50% 90% NN 50% I I Laem = SWin 90% SWout OV ton SW out L 10% torr Note: The rise/fall times (10%/90%) of Vin are both less than 1s.MB3802 @ APPLICATIONS 1. Separate Use of Two Switching Circuits DCGa rd SWINa SWOUTa VINa SWINB SWOUTs VINB GND Vss Vsa @) DCGe ] 3Vt05V a Load B to Load A 3Vto5V TIT TIT T/T TIT TIT Notes: 1. The two power supplies Vsa andVss can be used separated by controlling the voltages VINA and VINs> 2. Connect the DCD pin to GND when it is not used. 2. Switching Two Power Supplies VINA SWINa SWOUTa SWINs VINB SWOUTs GND VsB Vsa @) = + Load 3Vt0o5V 3Vt0o5V TIT Hr TIT TIT Note: When using different power supplies for a single load, control them by connecting an external capacitor so that both switches are not ON at the same time.MB3802 3. Switching Two Loads VINa DCGa ) TIT VINB GND SWINa SWOUTa SWINB SWOUTs Vs DCGe Load B 7H Load A 717 T 3Vto5V TIT Note: Make this connection to control two different loads separately for a single power supply. 4. Connecting Serial Switches VINa DCGa 71T VINB GND SWINa SWOUTa SWINB SWOUTs Vs DCGe Load B Tr Load A 7 Note: Make this connection to supply power from Vs to load B via load A. 3Vto5V TITMB3802 5. Connecting Parallel Switches DLYa DCGa VINA SWINa SWOUTA SWINs VINs SWOUTs GND TL |__| L* DLYs DCG _ Load 3Vto5V 71T ar TIT Note: Connect the circuits A and B in parallel to produce a low ON resistance (Ron = 0.06Q). In this case, connect the DLYA and DLYB pins in common to give synchronous ON/OFF between both switches. 6. 25% ON Resistance DCGa VINa DLYa SWINa SWOUTa SWINB SWOUTs DLYs | _} oxo DCGe | Vs T | [ pce | r Load VINa DLYa SWOUTa VINB V3Vto5V SWINB SWOUTs VINB DLYs ___}_] on? |_veee Notes: 1. Make this connection to produce an ON resistance that is much lower than the above connection. Also, connect the DLY pins in common. 2. Consider the difference between the ON resistances and the switch-ON/OFF times between two devices (MB3802) and insure that load control is not offset at one device.MB3802 7. Low-side Switch VIN A VINB GND SWINa SWOUTa SWINB Load A SWOUTs DLYa | DLYs Ra Re Load B Vin=3V,Vs=3V Vin=5V,Vs=5V Switch-ON time Switch-OFF time 80 ts 5.0ms 45 us 3.5 ms Ra and Re = 10 MQ Notes: __|_Vss __|_Vsa 3Vto5V 71T TTT 1. Make this connection to control the switch ON/OFF at the lower load side. 2. To assist the switch-OFF circuit operation driven by the SWin power supply, connect high resistances (Raand Rs = 5 to 10 MQ) to the DLY pins without overloading the DC/DC converter. 3. At this connection, the switch-OFF time is longer than the switch-ON time. 10 3Vto5Vm@ TYPICAL PERFORMANCE CHARACTERISTICS MB3802 ON Resistance (Input-voltage dependence) 150 ON Resistance (Load current dependence) 300 T T T T Isw= 1A Vswin = 5 V,Vin=3 V Vswin = 5 V,Vin=5 V IN - Vswn=6V \ Pe = 250 Vswn=5V @Q g \ -- Vswn=4V = {of} tN _+ _ 7 ~ ' Vswn=3V o - . - - 8 a en Vewin = 2 V E KN [Ein EE GE G 200 + tenes Vswin=1V > 100 oO wes Vswin = 0 V ) $ z Zz 2 Vswin = 3 V,Vin=3V O 150 ao \Vswin = 3 V,Vin=5V 100 -m0e 50 2.5 3.0 3.5 4.0 45 5.0 55 6.0 0.2 0.4 0.6 0.8 1.0 1.2. Input voltage (V) Load current (A) ON Resistance ON Resistance 450 (Temperature dependence: SWin = 3 V) 450 (Temperature dependence: SWin = 5 V) T T Vswin = 3 V Vswin = 5 V L = Isw=1A Isw=1A sw 7 | a => eC a z oo Ez - OD eo" o | o _ 2 A L 100 x Ss 10 p=; a a i 2 Le - 2 ~~ z Z Oo Oo Vn=z=3V VWin=3V Vn=5bV VWin=5V 50 50 | -25 0 25 50 75 25 0 25 50 75 Ta (C) Ta (C) Switch-ON time Switch-ON time 500 (Input voltage characteristic: SWin = 3 V) 500 (Input voltage characteristic: SWin = 5 V) q Vswin = 3'V Vswin =5V Isw=1A Isw=1A 400 400 S soo |S 2 NA IN 2 300 LSS 3900 LN zB N NA Zz SY 2 N. \ 2 200 = 3 S 200 Ss Nn. pr Ta=25C _| S <= L_ Ta =-25C S iw = L-Ta = +25C = 2 Ta = +25C = = A a el 100 S 400 E J Ta =+75C Ta =+75C 0 0 | 3.0 3.5 4.0 45 5.0 55 6.0 30 35 4.0 45 5.0 55 6.0 Input voltage (V) Input voltage (V) (Continued) 1412 MB3802 100 s) ON-time (m Switch-OFF Time (Input voltage characteristic: SWin = 3 V) 100 T Vswin = 3 V Isw=1A _ 90 g \ Ta = -25C 80 | ic T 25C a=+ 9 70 x __ fe 2 2 Ta=+75C 6. + . i : om Ce 50 3.0 3.5 4.0 4.5 5.0 55 6.0 Input voltage (V) Switch-ON Time (DLY-pin connection capacitance: SWin = 3 V) Vswin = 3 V Isw=1A 10 ] |e ee ] ] 1000 Capacitance (pF) Switch-OFF Time (DLY-pin connection capacitance: SWin = 3 V) ON-time (ms) 100 Switch-OFF Time (Input voltage characteristic: SWin = 5 V) 100 T Vswin = 5 V Isw=1A 90 QQ = 80 {|__| _t\ ee eS : RSS 2 70 < 2 = Ta = -25C o 60 Ta= +25C __| Ta=+75C 50 3.0 3.5 4.0 45 5.0 55 6.0 Input voltage (V) Switch-ON Time (DLY-pin connection capacitance: SWin = 5 V) F Vswin = 5 V C Isw=1A 10E 1 Z| E =~ a Ue a a a es L- 01 ! bop ! bop 100 1000 10000 Capacitance (pF) Switch-OFF Time (DLY-pin connection capacitance: SWin = 5 V) 10000 - 10000 'E E Vswn=3V E Vswin = 5 V T Iw=1A T Iw=1A ZA a @ 1000 F @ 1000 E iS F E F o C @ LL L - LL - LL i LL 100 \ 6 100 XK \Wieesy F \ ves LT Vin=5V Vin=5V io L | Lot tt | ee oe io L J ee ee | J Lo 100 1000 10000 100 1000 10000 Capacitance (pF) Capacitance (pF) (Continued)MB3802 (Continued) Discharge Resistance Discharge Resistance (DCG voltage dependence: SWin = 3 V) (DCG voltage dependence: SWin = 5 V) 10 Ff 10 E Vswin = 3 V Vswinn = 5 V C Isw=1A Isw=1A XS INS Ta = +75C Discharge resistance (kQ) SQ om SS Tas 138C SS Ta =+25C 7 Discharge resistance (kQ) 0.1 i 0.1 3 4 5 6 3 4 5 6 DCG voltage (V) DCG voltage (V) Output Leak Current (at switch OFF) Input Current (Input voltage dependence) 1000 - FE 300 <= L _ = YL 4 S200 Jo 3 ay 2 Ta = +75C Jy 510 EZ tee FD Oo 5 = 8 y g \ LA o Ta = +75C 5 100 o SL Ta= 425C a. ~~ E Ta =-25C ~ l-~T a =-25C | Vn=OV 10 0 2 3 4 5 6 0 1.0 2.0 3.0 4.0 5.0 SWIN voltage (V) Input voltage (V) Surge Current and Output Voltage Boot _Switch-On resistance (DLY-pin connection capacitance dependence) (relationship between Vin and Vs) 140 mQ 30 120 mo Open 510 pF Output voltage a 1000 pF , Open Q 510 pF Surge current c 1000 pF 2 Output GND Input GND 100 (Surge current) Vin=0>5V SWin = 5V Load capacitance = 47 uF Isw=1A 25 30 35 40 45 50 55 60 Time Vin voltage (V) V: 200 mA/div. (surge current) V: 1.0 V/div. (output voltage) H: 200 us/div. (time axis) 13MB3802 lm PACKAGE DIMENSIONS Plastic FTP, 16 pin (FTP-16P-M04) 10.15 *520{.400 oee) 2.10(.083)MAX HHAHAAEE ONIN (STAND OFF) INDEX 10.40 3.9040.30 6.40+0.40 5.40 {20 O (.1544.012) (.252+.016) (949 238) HH ERHHES | | 1.27(.050)TYP | | 0.45+0.10 @]00.13(.005) @ 0.15508 0,50+0.20 (.018+.004) (006 23%) (020.008) [C7|0.10(.004)| 8.89(.350)REF 1994 FWITSU UMITED Fi6012$-40-4 Dimensions in mm(inch) 14FUJITSU LIMITED For further information please contact: Japan FUJITSU LIMITED Corporate Global Business Support Division Electronic Devices KAWASAKI PLANT, 4-1-1, Kamikodanaka Nakahara-ku, Kawasaki-shi Kanagawa 211-88, Japan Tel: (044) 754-3753 Fax: (044) 754-3329 North and South America FUJITSU MICROELECTRONICS, INC. Semiconductor Division 3545 North First Street San Jose, CA 95134-1804, U.S.A. Tel: (408) 922-9000 Fax: (408) 482-9044/9045 Europe FUJITSU MIKROELEKTRONIK GmbH Am Siebenstein 6-10 63303 Dreieich-Buchschlag Germany Tel: (06103) 690-0 Fax: (06103) 690-122 Asia Pacific FUJITSU MICROELECTRONICS ASIA PTE. LIMITED No. 51 Bras Basah Road, Plaza By The Park, #06-04 to #06-07 Singapore 189554 Tel: 336-1600 Fax: 336-1609 F9607 FUJITSU LIMITED Printed in Japan MB3802 All Rights Reserved. Circuit diagrams utilizing Fujitsu products are included as a means of illustrating typical semiconductor applications. Com- plete information sufficient for construction purposes is not nec- essarily given. The information contained in this document has been carefully checked and is believed to be reliable. However, Fujitsu as- sumes no responsibility for inaccuracies. The information contained in this document does not convey any license under the copyrights, patent rights or trademarks claimed and owned by Fujitsu. Fujitsu reserves the right to change products or specifications without notice. No part of this publication may be copied or reproduced in any form or by any means, or transferred to any third party without prior written consent of Fujitsu. The information contained in this document are not intended for use with equipments which require extremely high reliability such as aerospace equipments, undersea repeaters, nuclear con- trol systems or medical equipments for life support. 15