KTS1688EUH-TR

Preliminary Datasheet KTS1688 Low Resistance Load Switch with Current Limit Control and Over-Voltage Reverse Blocking Protection Features Brief Description  Wide Input voltage range: 2.5V to 5.5V  28V Absolute Ratings at VOUT  Adjustable Current Limit to 2.5A  Integrated MOSFET with 68mΩ (Typ) at 5VIN and 1A IOUT  Output OVP 5.8V (Typ)  Open-Drain over-current fault flag  Integrated protection  Thermal Shutdown  Under-Voltage Lockout (UVLO)  Soft-start  OUT to IN Reverse Blocking  Pb-free Package:  9-Bump WLCSP 1.22mm x 1.22mm  -40°C to +85°C Temperature Range The KTS1688 is a slew-rate controlled, 68mΩ (Typ), low resistance MOSFET switch intended to be inserted between a power source and a load to isolate and protect against abnormal voltage and current conditions. Featuring slew-rate turn on control, to prevent excessive input voltage or battery droop resulting from a large inrush current, the KTS1688 also features several additional protection functions, such as output over-voltage and input under-voltage protection, plus over-current (with Fault-flag) and over-temperature protection. Operating from a wide input voltage range of 2.5V to 5.5V, the KTS1688 in the OFF state can block voltages on the OUT pin of up to 28V. The switch CTRL input is active high and includes a resistor pull-down. The device is packaged in advanced, fully “green” compliant, 1.22mm x 1.22mm, Wafer-Level Chip-Scale Package (WLCSP). Applications  Smart Phones, and Tablets  Mobile Internet Devices  Peripherals  Storage, DSLR and Portable Devices Typical Application KTS1688 VIN IN 2.5V to 5.5V + _ VIO Control CIN 0.1µF On/Off CTRL R1 100kΩ ADJ COUT 1µF FLAG GND RADJ 420Ω March 2016 – Revision 03a VOUT OUT Page 1 Company Confidential Preliminary Datasheet KTS1688 Pin Descriptions Pin # Name A3, B3 OUT A1, B1 IN A2 Function Switch Output Supply Input: Input to the power switch GND Ground reference CTRL Logic Enable Control Input: Active HIGH – GPIO compatible C1 FLAG Flag Output: Active LOW, open-drain to indicate current limiting. . External pull-up resistor of greater than 10k is recommended C2 ADJ B2 C3 Logic HIGH Enable Operation Logic LOW Disable Operation Current Limit adjustment pin: An external resistor from ADJ to GND sets the current limit at the output. WLCSP-9 TOP VIEW TOP VIEW IN GND OUT B IN GND OUT C FLAG ADJ CTRL 1 2 3 XX YYZZ A 9-Bump 1.22 x 1.22 mm WLCSP Package YYZZ (Date Code and Assembly Code) XX = Device Code (Top Mark) March 2016 – Revision 03a Page 2 Company Confidential Preliminary Datasheet KTS1688 Absolute Maximum Ratings1 (TA = 25C unless otherwise noted) Symbol Description Value OUT Output voltage -0.3 to 28.0 Input Voltage -0.3 to 6.0 Control, Flag and Adjust pins -0.3 to 6.0 IN CTRL, FLAG, ADJ Units V ISW Maximum Continuous Switch Current2 tPD Total Power Dissipation at TA = 25°C TJ Operating Junction Temperature Storage Junction Temperature -65 to +150 C TSTG 2.8 A 1.0 W -40 to +150 C Thermal Capabilities Symbol Description ΘJA Thermal Resistance – Junction to PD Maximum Power Dissipation at TA ≤ 25°C ΔPD/ΔT Ambient3 Derating Factor Above TA = 25°C Value Units 95 C /W 1 W -10.5 mW/C Recommended Operation Conditions4 Symbol Value Units VIN Description Supply Voltage 2.5 to 5.5 V TA Ambient Operating Temperature -40 to +85 C Ordering Information Part Number Marking5 Operating Temperature Package KTS1688EUH-TR JEYYZZ -40°C to +85°C WLCSP-9 1. Stress exceeding the absolute maximum rating may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may effect device reliability. The absolute maximum ratings are stress ratings only. 2. Maximum Junction Temperature = 85°C 3. Junction to Ambient thermal resistance is highly dependent on PCB layout. Values are based on thermal properties of the device when soldered to an EV board. 4. The recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Kinetic does not recommend exceeding them or designing to Absolute Maximum Rating. 5. “YYZZ” is the date code and assembly code. March 2016 – Revision 03a Page 3 Company Confidential Preliminary Datasheet KTS1688 Electrical Characteristics6 Unless otherwise noted, VIN = 2.5V to 5.5V, TA = -40°C to +85°C, typical values are at VIN = 5V and TA = 25°C. Symbol Description Conditions Min Typ Max Units Basic Operation VIN VUVLO Input Voltage Under-Voltage Lockout 2.5 VIN Increasing 5.5 V 2.3 V 0.3 V VUVLO_HYS UVLO Hysteresis ISD(OFF) Shutdown Current VIN = 5.5V, CTRL = GND 1.0 4.0 µA IQ Quiescent Current IOUT = 0mA 120 160 µA VIN = 5.0V, IOUT = 1A 68 95 VIN = 3.7V, IOUT = 1A 75 105 RON VIH VIL VOL_FLAG IFLAG_LK RCTRL ON Resistance CTRL Input Logic HIGH Voltage CTRL Input Logic LOW Voltage FLAG Output Logic LOW Voltage FLAG Output High Leakage Current Pull-Down Resistance at CTRL Pin VIN = 2.5V to 5.5V 1.25 mΩ V VIN = 2.5V to 5.5V 0.55 VIN = 5V, ISINK = 1mA 0.1 0.2 VIN = 2.5V, ISINK = 1mA 0.15 0.30 VIN = 5V, Switch On 1 4 V V µA MΩ Over-Voltage Protection VOV_TRIP Output OVP Lockout OUTHYS Output OVP Hysteresis TOVP OVP Response Time VOUT Rising Threshold 5.5 VOUT Falling Threshold 5.8 6.0 5.7 IOUT = 0.5A, CL = 1µF, TA = 25°C, VOUT from 5.5V to 6.0V V 0.1 V 0.2 µs Over-Current Protection ILIM Current Limit tOCP Over-Current Response Time TSD Over-Current Flag Response Time Thermal Shutdown THYST Thermal Hysteresis tOC_FLAG VIN = 5V, RADJ = 420Ω, VOUT = 1.68V to 5V7 Moderate Over-Current Condition, IOUT  ILIM VOUT ≤ VIN When Over-Current Occurs to Flag Pulling LOW 2.2 2.5 2.8 A 7 µs 9 ms 150 °C 20 °C Dynamic Characteristics tDON Turn-On Delay8 0.6 ms tR VOUT Rise Time8 0.6 ms 0.1 ms 0.22 ms tDOFF Turn-Off Delay tF VOUT Fall Time VIN = 5V, RL = 100Ω, CL = 1µF, TA = 25°C, RADJ = 2040Ω 6. KTS1688 is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range by design, characterization and correlation with statistical process controls. 7. Based on characterization with a 1% tolerance resistor 8. Timing defined in Figure 1 March 2016 – Revision 03a Page 4 Company Confidential Preliminary Datasheet KTS1688 Timing Diagram 90% VCTRL 10% 90% 90% VOUT 10% 10% tdON tR tdOFF tON tF tOFF Figure 1. Timing Diagram March 2016 – Revision 03a Page 5 Company Confidential Preliminary Datasheet KTS1688 Typical Characteristics VIN = 5V, CIN = 0.1µF, COUT = 1µF, RADJ = 420Ω, CTRL = VIN, Temp = 25°C unless otherwise specified. Shutdown Current vs. VIN (CTRL = GND) Quiescent Current vs. VIN (No load) 250 Quiescent Current (µA) Shutdown Current (µA) 2.0 1.5 1.0 0.5 0.0 200 150 100 50 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 2.5 Input Voltage (V) 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) CTRL Enable Threshold vs. VIN CTRL High Threshold (V) 1.5 1.2 0.9 0.6 0.3 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) March 2016 – Revision 03a Page 6 Company Confidential Preliminary Datasheet KTS1688 Typical Characteristics (continued) VIN = 5V, CIN = 0.1µF, COUT = 1µF, RADJ = 420Ω, CTRL = VIN, Temp = 25°C unless otherwise specified. Turn On Response Turn Off Response (RL = 100Ω) CTRL 1V / div CTRL 1V / div VOUT 1V / div VOUT 1V / div 200µs / div 100µs / div FLAG Response Time (RADJ = 524Ω) VIN 1V / div VOUT 2V / div FLAG 5V / div IOUT 1A / div 4ms / div March 2016 – Revision 03a Page 7 Company Confidential Preliminary Datasheet KTS1688 Functional Block Diagram OUT IN UVLO Charge Pump ISW UVLO ADJ CTRL ISET Control Logic FLAG OVP IMAX EN Thermal Shutdown GND Functional Description The KTS1688 is a slew-rate controlled, 68mΩ, low resistance MOSFET switch intended to be inserted between a power source and a load to isolate and protect against abnormal voltage and current conditions. Featuring slew-rate turn on control, to prevent excessive voltage droop resulting from large inrush current, the KTS1688 also features several additional protection functions, such as output over-voltage and input under-voltage protection, plus over-current and over-temperature protection. Operating from a wide input voltage range of 2.5V to 5.5V, the KTS1688 in the OFF state can block voltages on the OUT pin of up to 28V. Under-Voltage Lockout (UVLO) When CTRL is taken high, the UVLO function will keep the switch in the OFF state until the input voltage rises above the UVLO threshold. If the input voltage falls below this threshold the switch will return to the OFF state. Fault Reporting (FLAG) In an over-current condition the FLAG pin will be asserted LOW. A pull-up resistor should be connected from FLAG to the system I/O rail. March 2016 – Revision 03a Page 8 Company Confidential Preliminary Datasheet KTS1688 Current Limiting The current limit is set by an external resistor connected between the ADJ and GND pins. When the switch current reaches the maximum value set, the switch will act as constant current source until the power dissipation causes thermal shutdown. When the chip temperature cools, the device will recover and turn back on. The current limit resistor setting is shown below in Figure 2. A resistor with a tolerance of 1% or less is recommended. 2500 Current Limit (mA) 2250 2000 1750 1500 1250 1000 750 500 400 600 800 1000 1200 1400 1600 1800 2000 Radj Resistor (Ω) Figure 2. Current Limit Resistor Settings9 Thermal Protection The KTS1688 features thermal shutdown to prevent the device from overheating. The internal FETs turn off when the junction temperature exceeds +150°C (typ). The device exits thermal shutdown after the junction temperature cools by 20°C (typ) hysteresis. 9 Recommend 1% tolerance resistors. March 2016 – Revision 03a Page 9 Company Confidential Preliminary Datasheet KTS1688 Applications Input Capacitor For most applications, connect a 1nF ceramic capacitor as close as possible to the device from IN to GND to minimize the effect of parasitic trace inductance. OUT Output Capacitor The internal soft-start function allows the KTS1688 to charge an output capacitor up to 100μF without turning off due to overcurrent. As a minimum it is recommended to bypass OUT with a 1µF ceramic capacitor. Layout Recommendation Figure 3. Recommended PCB Layout for WLCSP-9 Package March 2016 – Revision 03a Page 10 Company Confidential Preliminary Datasheet KTS1688 Package Drawing WLCSP-9, 1.22mm x 1.22mm x 0.62mm Recommended Footprint (NSMD Pad Type) 0.40mm 0.40mm 0.80mm 0.21mm Copper Pad Diameter 0.80mm 0.31mm Solder Mask Opening * Dimensions are in millimeters. Kinetic Technologies cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Kinetic Technologies product. No intellectual property or circuit patent licenses are implied. Kinetic Technologies reserves the right to change the circuitry and specifications without notice at any time. March 2016 – Revision 03a Page 11 Company Confidential