SY6288D1AAC

Application Note: AN_SY6288 Low Loss Power Distribution Switch General Description Features SY6288 is an ultra-low RDS(ON) switch with current limiting function to protect the power source from over current and short circuit conditions. Ordering Information • • • SY6288□(□□)□ • Temperature Code Package Code Optional Spec Code Ordering Number SY6288AAAC SY6288ACAC SY6288AFAC SY6288A1AAC SY6288BAAC SY6288BCAC SY6288BFAC SY6288CAAC SY6288C3AAC SY6288C30AAC SY6288CFAC SY6288CCAC SY6288C1CAC SY6288C2CAC SY6288C4CAC SY6288C5CAC SY6288C30CAC SY6288DAAC SY6288D1AAC SY6288D30AAC SY6288DCAC SY6288D1CAC SY6288D2CAC SY6288D5CAC SY6288DFAC SY6288D1FAC • • Package type SOT23-5 MSOP8 SO8 SOT23-5 SOT23-5 MSOP8 SO8 SOT23-5 SOT23-5 SOT23-5 SO8 MSOP8 MSOP8 MSOP8 MSOP8 MSOP8 MSOP8 SOT23-5 SOT23-5 SOT23-5 MSOP8 MSOP8 MSOP8 MSOP8 SO8 SO8 Note 0.6A/Active High 0.6A/Active High 0.6A/Active High 0.6A/Active High 0.6A/Active Low 0.6A/Active Low 0.6A/Active Low 2A/Active High 1.5A/Active High 2A/Active High 2A/Active High 2A/Active High 1.5A/Active High 1.5A/Active High 2A/Active High 2.5A/Active High 2A/Active High 2A/Active Low 1.5A/Active Low 2A/Active Low 2A/Active Low 1.5A/Active Low 1.5A/Active Low 2.5A/Active Low 2A/Active Low 1.5A/Active Low • • • • • • Distribution voltages: 2.5V to 5.5V Over temperature shutdown and automatic retry Reverse blocking (no body diode) At shutdown, OUT can be forced higher than IN Fault flag (OCB) output if over current, thermal shut down, reverse blocking happens. Automatic output discharge at shutdown o SY6288A1: No output discharge function o Others: Auto output discharge function Built-in softstart 0.4ms rise time RoHS Compliant and Halogen Free Two Enable polarities and three current levels o SY6288A: Active High/0.6A o SY6288A1: Active High/0.6A o SY6288B: Active Low/0.6A o SY6288C: Active High/2A o SY6288C1: Active High/1.5A o SY6288C2: Active High/1.5A o SY6288C3: Active High/1.5A o SY6288C30: Active High/2A o SY6288C4: Active High/2A o SY6288C5: Active High/2.5A o SY6288D: Active Low/2A o SY6288D1: Active Low/1.5A o SY6288D2: Active Low/1.5A o SY6288D5: Active Low/2.5A o SY6288D30:Active Low/2A Compact packages minimize board space: SOT23-5, SO8, MSOP8 UL certification NO. 20100428-E333762 TUV certification NO. R501887690001 Typical Application Circuit Note: A low-ESR 150uF aluminum electrolytic or tantalum between VOUT and GND is strongly recommended. AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 1 AN_SY6288 Pin Configurations (Top View) SOT23-5 MSOP8 SO8 Part Number Package type SY6288AAAC SOT23-5 SY6288ACAC MSOP8 SY6288AFAC SO8 SY6288A1AAC SOT23-5 SY6288BAAC SOT23-5 SY6288BCAC MSOP8 SY6288BFAC SO8 SY6288CAAC SOT23-5 SY6288C3AAC SOT23-5 SY6288C30AAC SOT23-5 SY6288CCAC MSOP8 SY6288C1CAC MSOP8 SY6288C2CAC MSOP8 SY6288C4CAC MSOP8 SY6288C5CAC MSOP8 SY6288C30CAC MSOP8 SY6288CFAC SO8 SY6288DAAC SOT23-5 SY6288D1AAC SOT23-5 SY6288D30AAC SOT23-5 SY6288DCAC MSOP8 SY6288D1CAC MSOP8 SY6288D2CAC MSOP8 SY6288D5CAC MSOP8 SY6288DFAC SO8 SY6288D1FAC SO8 Note① ： x=year code, y=week code, z= lot number code. Top Mark CWxyz ABTxyz AAJxyz Fdxyz DBxyz ABDxyz AALxyz DFxyz FPxyz Brxyz ABUxyz ADKxyz ADLxyz AEXxyz AZDxyz ARWxyz AAMxyz Buxyz DSxyz Bqxyz ABExyz ACKxyz AEHxyz AZExyz AANxyz ACJxyz ① Functional Pin Description Pin Name IN GND OUT ENSY6288A/A1/C/C1/C2/C3/C30/C4/C5 ENB- SY6288B/D/D1/D2/D5/D30 OCB AN_SY6288 Rev.1.0 Pin Number (SO8, MSOP8) 2,3 1 6,7,8 Pin number (SOT23-5) 5 2 1 4 4 ON/OFF control. Don’t float. EN: high enable. ENB: low enable. 5 3 Open Drain Fault Flag Pin Description Input pin Ground pin Output pin Silergy Corp. Confidential-prepared for Customer Use Only 2 AN_SY6288 Absolute Maximum Ratings (Note 1) All pins-------------------------- -------------------------------------------------------------------------------- 6V Power Dissipation, PD @ TA = 25°C SOT23-5/MSOP8/SO8--------------------------------------------- 0.4/0.5/0.65W Package Thermal Resistance (Note 2) SOT23-5/MSOP8/SO8, θ JA ------------------------------------------------------------------------ 250/150/90°C/W SOT23-5/MSOP8/SO8, θ JC ------------------------------------------------------------------------ 130/ 65/ 45°C/W Junction Temperature Range ---------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) -----------------------------------------------------------------------260°C Storage Temperature Range ----------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions (Note 3) IN----------------------------------------------------------------------------------------------------------------- 2.5V to 5.5V EN/ENB--------------------------------------------------------------------------------------------------------- -0.3V to VIN+0.3V All other pins --------------------------------------------------------------------------------------------------- 0-5.5V Junction Temperature Range -------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------- -40°C to 85°C AN_SY6288 Rev.1.0 Silergy Corp. Confidential-prepared for Customer Use Only 3 AN_SY6288 Electrical Characteristics (VIN = 5V, CL=1uF, per channel, TA = 25°C unless otherwise specified) Parameter Input Voltage Range Symbol VIN Shutdown Input Current ISHDN Quiescent Supply Current IQ FET RON RDS(ON) Current Limit ILIM Short Circuit Output Current IOS Logic-Low Voltage Logic-High Voltage IN UVLO Threshold IN UVLO Hysteresis Turn-ON Time OCB Low Resistance OCB Delay Time OUT Shutdown Discharge Resistance Thermal Shutdown Temperature Thermal Shutdown Hysteresis VIL EN/ EN Threshold Test Conditions Open load, switch off Output grounded, switch off Open load, switch on SOT23-5 (SY6288A/A1/B/C/D/D1) SOT23-5(SY6288C3/C30/D30) MSOP8 (SY6288A/B/C/C1/C4) MSOP8(SY6288C2/C5/D1/D2/D5) MSOP8 (SY6288C30/D) SO8( SY6288A/B/C/D/D1) SY6288A/A1/B SY6288C/C30/D SY6288C1 SY6288C2/C3/D2 SY6288D1 SY6288C4 SY6288C5/D5 MSOP8 (SY6288D), OUT connected to GND device enabled. VIH VIN,UVLO VIN,HYS TON Typ 0.1 0.1 32 Max 5.5 1 1 Unit V µA µA µA 60 80 100 mΩ 50 60 50 57 65 0.8 2.1 1.6 1.5 1.6 2.5 2.7 70 80 70 70 85 1.2 2.9 2.4 1.75 2.5 2.9 3.55 90 100 90 83 105 1.6 3.7 3.2 2 3.7 3.7 4.4 mΩ mΩ mΩ mΩ mΩ A A A A A A A 1.2 1.8 2.4 A 0.8 V 2 V 2.4 RL=5 Ω, CL=1uF ROCB TOCB_Delay RDIS Min 2.5 Except for SY6288A1 TSD 0.1 400 10 10 V V µs Ω ms 10 Ω 150 °C 20 °C Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 2: θ JA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of JEDEC 51-3 thermal measurement standard. Note 3: The device is not guaranteed to function outside its operating conditions AN_SY6288 Rev.1.0 Silergy Corp. Confidential-prepared for Customer Use Only 4 AN_SY6288 Typical Operating Characteristics (SY6288DFAC) AN_SY6288 Rev.1.0 Silergy Corp. Confidential-prepared for Customer Use Only 5 AN_SY6288 Output Fall Time vs. VIN ( RL=2.5Ω ) 2400 Rise Time (us) 2100 1800 1500 1200 COUT=1uF 900 COUT=100uF 600 COUT=470uF 300 0 2.5 3 3.5 4 4.5 5 5.5 Current Limit (A) VIN (V) AN_SY6288 Rev.1.0 Silergy Corp. Confidential-prepared for Customer Use Only 6 6 AN_SY6288 Block diagram AN_SY6288 Rev.1.0 Silergy Corp. Confidential-prepared for Customer Use Only 7 AN_SY6288 Operation The SY6288 is a current limited P-channel MOSFET power switch designed for high-side load-switching applications. There is no parasitic body diode between drain and source of the MOSFET, so the SY6288 prevents current flow from out to input when out being externally forced to a higher voltage than VIN when chip is disabled. Over-current protection When the over-current condition is sensed, the gate of the pass switch is modulated to achieve constant output current. Under output short circuit conditions, the normal current limit folded back 50%. If the over current condition persists for a long enough time, the junction temperature may exceed 150°C, and overtemperature protection will shut down the part. Once the chip temperature drops to 130°C, the part will restart. Fault Flag (OCB) The OCB output is asserted (active low) when an over temperature shutdown condition is encountered. The OCB will also be pulled if over current or reverse blocking happens and persists for 10ms. The output remains asserted until the fault status is removed. Connecting a heavy capacitive load to an enabled device can cause a momentary over current condition; however, no false reporting on OCB occurs due to the 10-ms deglitch circuit. OCB is not deglitched when the switch is turned OFF due to an over temperature shutdown. Supply Filter Capacitor In order to prevent the input voltage drooping during hot-plug events, a 10uF ceramic capacitor form VIN to GND is strongly recommended. However, higher capacitor values could reduce the voltage droop on the input further. Furthermore, an output short will cause ringing on the input without the input capacitor. It could destroy the internal circuitry when the input transient exceeds 6V which is the absolute maximum supply voltage even for a short duration. Output Filter Capacitor Between VOUT and GND, a low-ESR 150uF aluminum electrolytic or tantalum capacitor is strongly recommended to meet the 330mV maximum droop requirement. Standard bypass methods should be used to minimize inductance and resistance between the bypass capacitor and the down steam connector. This will reduce EMI and improve the transient performance. If long cables are connected to the output terminals, an anti-parallel schottky diode such as BAT54 is suggested to be placed in parallel with the output terminals to absorb the negative ringing due to the cable inductance. PCB Layout Guide For best performance of the SY6288, the following guidelines must be strictly followed: Locate the ceramic bypass capacitors as close as possible to the VIN pins and VOUT pins of SY6288. Keep all VBUS traces as short and wide as possible and use at least 2 ounce copper for all VBUS traces. Place a ground plane under all circuitry to lower both resistance and inductance and improve DC and transient performance. A low-ESR 150uF aluminum electrolytic or tantalum capacitor between VOUT and GND is strongly recommended. Locate the output capacitor as close to the connectors as possible to lower impedance (mainly inductance) between the port and the capacitor and improve transient performance. Input and output capacitors should be placed closed to the IC and connected to ground plane to reduce noise coupling. AN_SY6288 Rev.1.0 PCB Layout Guide (SO8) Silergy Corp. Confidential-prepared for Customer Use Only 8 AN_SY6288 PCB Top Over Layer (SO8) PCB Bottom Layer (SO8) PCB Top Layer (SO8) AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 9 AN_SY6288 SOT23-5 Package outline & PCB layout design 0.55 1.50 - 1.70 0.80 2.70 - 3.00 2.40 2.80 - 3.10 0.30 - 0.50 0.95 TYP 0.3 - 0.6 0.01 - 0.1 0.1 - 0.15 0.25 REF Recommended Pad Layout 1.0 - 1.3 0.95 TYP 1.90 TYP Notes: All dimensions are in millimeters. All dimensions don’t include mold flash & metal burr. AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 10 AN_SY6288 5.40 3.80 - 4.00 1.27 TYP 5.80 - 6.20 6.10 1.55 SO8 Package outline & PCB layout design 0.60 0.30 – 0.50 0.60 - 0.85 0.08 - 0.25 4.80 - 5.00 1.40 - 1.60 ° -8 0.25 base 0 45° 0.25 - 0.50 0.18 - 0.25 Recommended Pad Layout 1.27 (TYP) Notes: All dimensions are in millimeters. All dimensions don’t include mold flash & metal burr. AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 11 AN_SY6288 MSOP8 Package outline & PCB layout design 4.70-5.10 5.30 2.85-3.10 1.35 0.65 0.75-0.95 0.40-0.80 0.25 base 0.10-0.25 2.85-3.10 0.05-0.15 0.45 Recommended Pad Layout 0.65 (TYP) Notes: All dimensions are in millimeters. All dimensions don’t include mold flash & metal burr. AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 12 AN_SY6288 Taping & Reel Specification 1. Taping orientation SOT23-5 3.9/4.1 7.7/8.3 1.45/1.55 Feeding direction SOP8 1.45/1.55 11.7/12.3 3.9/4.1 Feeding direction MSOP8 1.45/1.55 11.7/12.3 3.9/4.1 Feeding direction AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 13 AN_SY6288 2. Carrier Tape & Reel specification for packages Package types Tape width (mm) Pocket pitch(mm) Reel size (Inch) Reel width(mm) Trailer length(mm) Leader length (mm) Qty per reel SOT23-5 8 4 7" 8.4 280 160 3000 SOP8 12 8 13" 12.4 400 400 2500 MSOP8 12 8 13" 12.4 400 400 3000 3. Others: NA AN_SY6288 Rev. 1.0 Silergy Corp. Confidential-prepared for Customer Use Only 14