BD4140HFV

Hi-performance Regulator IC Series for PCs PGOOD IC for PC BD4140HFV No.09030EBT18 ●Description BD4140HFV is 1ch reset IC for watching the voltage. The detected voltage is 0.5V, and it is available to several kinds of voltage with additional external resistance. For the independent supply voltage (VCC), the “L” level of voltage is guaranteed in case the watching input voltage is also low. ●Features 1) Open drain output type 2) Built in Under Voltage LockOut (UVLO) circuit 3) HVSOF5 package : 1.6×1.6×0.6(mm) ●Applications Laptop PC, Desktop PC, LCD-TV, Printer, STV, Digital appliances ●Absolute maximum ratings (Ta=25℃) Parameter Terminal voltage Power Dissipation PGOOD Capacity Current Operating temperature range Storage temperature range Junction Temperature Symbol VCC, IN, DLY, PGOOD Pd IPGOOD Topr Tstg Tjmax BD4140HFV 6 *1 *2 0.67 5 -10～+100 -55～+150 +150 Unit V W mA ℃ ℃ ℃ *1 Do not however exceed Pd. *2 Reduced by θja= 186.6℃W for increase in Ta of 1℃ over 25℃. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB which has 1 layer. (copper foil density :2%)) *3 Reduced by θja= 185.2℃W for increase in Ta of 1℃ over 25℃ (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB which has 1 layer.) ●Operating Conditions (Ta=25℃) Parameter Symbol VCC IN PGOOD DLY Min. 3.0 -0.3 -0.3 -0.3 Max. 5.5 VCC-2 5.5 VCC Unit V V V V Terminal voltage ●ELECTRICAL CHARACTERISTICS (Unless otherwise noted, Ta=25℃, VCC=5V) Limits Parameter Symbol Min. Typ. Max. Bias Current Icc 5 10 Detected Voltage 491 500 509 VDET Hysteresis Voltage VHYS 10 Delay Current IDLY 150 250 350 PGOOD Output ON Resistance 100 200 RVOUT PGOODOutput Leak Current IOUT 0 5 Unit μA mV mV nA Ω μA Conditions IN sweep up IN sweep down IN=0.6V IN=0V IN=0.6V www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1/8 2009.04 - Rev.B BD4140HFV ●Block Diagram VCC 3 UVLO VDD Technical Note The recommended total resistance value for R1 and R2 is within 300kΩ. R1 R2 PGOOD IN 4 DELAY 0.5V 1 R3 R3 should be set not to be affected by leakeage current （ MAX 5 μ A ） and power current （5mA）. Please set C1 with double of MIN Delay Time. DLY 5 C1 2 GND ●Pin Layout PGOOD 1 5 DLY GND 2 IN VCC 3 4 ●Pin Function Table PIN No. 1 2 3 4 5 Bottom PIN Name PGOOD GND Vcc IN DLY FIN PIN Function Reset Output Pin (Power Good Signal) Ground Pin Power Supply Input Pin Watching Voltage Input Pin Capacitor connected pin for setting delay time Substrate www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2/8 2009.04 - Rev.B BD4140HFV ●Explanation of Operation BD4140HFV is 1ch reset IC with independent supply voltage. The following voltage is available to input VCC voltage before the watching input voltage. (Input-output voltage characteristic) (in case VCC=5V) 5 Technical Note VCC [V] 0 0.5 IN [V] (Detected delay time setting) IN [V] 0.5 0 HYS=10mV(TYP) TDELAY is calculated with formula below. TDELAY [sec] = CEXT [μF]×0.5 0.25 [μA] = 2×CEXT[pF]×10-6 ｔ DLY [V] 0.5 CEXT [pF] = TDELAY [sec] / (2×10-6) ｔ TDELAY PGOOD [V] (Example) When using the 4700pF capacitor, TDELAY [sec] = 2×4700 [pF]×10 -6 -6 = 9400×10 = 9.4 [ms] ｔ (Example) When setting 2ms Delay, CEXT = 2 [ms] ×0.25 [uA] / 0.5 = -3 -6 2×10 × 0.25×10 0.5 = 1×10-9 = 1000[pF] www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 3/8 2009.04 - Rev.B BD4140HFV Technical Note ① When VCC is below the minimum operation voltage, PGOOD pin will be at H level. (The meaning of the minimum operation voltage is : When the starting of VCC, PGOOD output voltage become within 10% of VCC voltage, and the value will be around 0.8VTYP(RPGOOD=100kΩ) and 1.0VTYP(RPGOOD=10kΩ). But note that this value is reference.) ② If VCC value exceeds the minimum operation voltage, by the VCC reached UVLO cancellation voltage (2.5V TYP), PGOOD output become at L level. ③ If VCC exceeds UVLO cancellation voltage, when the input voltage of IN pin is over the detected voltage, PGOOD pin will be at H level, and when the input voltage of IN pin is below the detected voltage, PGOOD pin will be at L level. (PGOOD=OK) UVLO Cancellation voltage 5 VCC [V] 2.5 1(0.8) 0 VCC VCC ｔ IN GND PGOOD DLY RPGOOD PGOOD [V] ｔ (PGOOD=NG) 5 VCC [V] VCC VCC 0 RPGOOD 1(0.8) ｔ IN PGOOD DLY GND PGOOD [V] ｔ www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 4/8 2009.04 - Rev.B BD4140HFV ●Evaluation Board Circuit ■ BD4140HFV (The direction is ※When you order , please order in times the amount of package quantity. Technical Note R1 U1 BD4140HFV 3 VCC PGOOD 1 C1 PGOOD VCC R4 C4 DLY 5 IN C2 GND 2 GND IN 4 R2 R3 C3 ■ BD4140HFV Evaluation Board Standard Component List (at detecting 0.5V) Component U1 C1 C2 C3 C4 Rating 1000pF Manufacturer ROHM murata Product Name BD4140HFV GRM1552C1H102JA01 Component R1 R2 R3 R4 Rating 100kΩ 0Ω 0Ω Manufacturer ROHM jumper jumper Product Name ■ BD4140HFV Evaluation Board Layout Silk screen (Top) TOP Layer Bottom Layer www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 5/8 2009.04 - Rev.B BD4140HFV Technical Note ●Operation Notes 1. Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2. Power supply lines Please add a protection diode when a large inductance component is connected to the output terminal, and reverse-polarity power is possible at startup or in output OFF condition. (Example) OUTPUT PIN 3. GND voltage The potential of GND pin must be minimum potential in all operating conditions. 4. Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 5. Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 6. Testing on application boards When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Always turn the IC's power supply off before connecting it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting or storing the IC. 7. Regarding input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes can occur inevitable in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Resistor Pin A Pin A P + Transistor (NPN) Pin B C B E B P P + Pin B N P P + N N N Parasitic element P+ N N C E P substrate Parasitic element GND P substrate Parasitic element GND GND GND Parasitic element Other adjacent elements www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 6/8 2009.04 - Rev.B BD4140HFV ●Power Dissipation Characteristics ◎HVSOF5 [W] 1 PCB size：70mm×70mm×1.6mmt ①board：1 layer board（copper foil density : 2%） Technical Note 0.8 Power Dissipation [Pd] ①0.67W 0.6 0.4 0.2 0 25 50 75 100 125 150 [℃] Ambient Temperature [Ta] www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 7/8 2009.04 - Rev.B BD4140HFV ●Ordering part number Technical Note B D 4 Part No. 1 4 0 H F V - T R Part No. Package FV : HVSOF5 Packaging and forming specification TR: Embossed tape and reel HVSOF5 1.6±0.05 1.0±0.05 5 4 (0.8) 0.2MAX Tape Quantity Direction of feed Embossed carrier tape 3000pcs TR The direction is the 1pin of product is at the upper right when you hold 1.2±0.05 (MAX 1.28 include BURR) (0.3) (0.05) 1.6±0.05 4 5 (0.91) (0.41) ( reel on the left hand and you pull out the tape on the right hand 1pin ) 123 321 0.13±0.05 S 0.6MAX +0.03 0.02 –0.02 0.1 0.5 0.22±0.05 S 0.08 M Direction of feed (Unit : mm) Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 8/8 2009.04 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. 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