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| YB1900 Ultra Low Quiescent Current Smart Load Switch Description The YB1900 is a high side slew rate controlled smart load switch. The slew rate control in YB1900 can effectively avoid the large in-rush current which is commonly observed in normal power switches. Moreover, the level shift in YB1900 allows customers to control 1.8 to 6.5V system with 1.5V logic and without sacrificing leakage current. The YB1900 has typical low RDS(on) at 100m, it allows large power handling capabilities. And very low quiescent current and fast load discharge make it ideal for power sensitive applications nowadays. The YB1900 is available in SOT23-5 package with the temperature range valid from -40 to 100 . Feature 1.8 to 6.5V Input Voltage Range Slew Rate Limited at 100s Very Low RDS(on), Typically 100m Less than 1A shutdown current Output Voltage as low as 0.6V Very Low Quiescent Current, Typically 2A Fast shutdown load discharge Thermal Fault Protection TTL / CMOS Input Logic Level 2KV ESD Rating EMI Free Circuit SOT23-5 Package Green Package (RoHS) Available Applications Cellular and Smart Phones Hot Swap Supplies Microprocessors and DSP Core Supplies PDAs MP3 Players Digital Still and Video Cameras Portable Instruments Typical Application Circuit VIN CIN 1F OUT YB1900 EN GND COUT 0.1F Figure1Typical Application Circuit YB1900 MRev.1.2 www.yobon.com.tw 1 YB1900 Ultra Low Quiescent Current Smart Load Switch Pin Configuration OUT GND EN 1 2 3 SOT23-5 Figure2YB1900 SOT23-5 5 4 VIN VIN Pin Assignment & Description Table1 Pin 1 2 3 4, 5 NAME OUT GND EN VIN Function Drain of P-channel Power MOSFET. Ground Pin. Connect directly to local ground plane. Enable Control Input. Source of P-channel Power MOSFET. Ordering Information Table2 Order Number YB1900ST25 Package Type SOT23-5 Supplied as 3000 Units Tape & Reel Package Marking Y9A YB1900 MRev.1.2 www.yobon.com.tw 2 YB1900 Ultra Low Quiescent Current Smart Load Switch Absolute Maximum Ratings (note 1) VIN to GND .......................................-0.3V to 6.5V VEN to GND ......................................-0.3V to 6.5V OUT to GND ....................................-0.3V to 6.5V Maximum Continuous Current...................... 2.2A Junction Temperature................................. 150 Storage Temperature.................... -65 to 150 Lead Temperature ...................................... 300 ESD HBM ......................................................2KV ESD MM ...................................................... 200V Recommended Operating Conditions (note 2) Supply Voltage VIN ................................. 1.8 to 6V Operating Temperature .................... -40 to 85 Thermal Resistance JA .........................................................220 / W Note: 1. Exceeding these ratings may damage the device. 2. The device is not guaranteed to function outside of its operating conditions. Electricity Characteristics Table3 (VIN=5V, VEN=1.5V, TA=25C, unless otherwise noted) Symbol VIN IQ ISD ISO Description Input Voltage Quiescent Current Shutdown Current Off Switch Current VEN=1.5V Test Conditions Min 1.8 TYP 5 2 0.05 0.05 100 110 130 200 0.6 MAX 6.5 4 1 1 130 140 160 250 1 Units V A A A VEN=0V, OUT = Open VEN=0V, VOUT = 0 VIN=5V @ 100mA VIN=4.2V @ 100mA VIN=3V @ 100mA VIN=1.8V @ 100mA ROUT = 10 ROUT = 10 VEN=5.5V ROUT = 10 ROUT = 10 ROUT = 10 VEN=0V 140 120 0.4 RDS(ON) On Resistance m VIL VIH ISINK TD(ON) TON TD(OFF) RPD TSD TR Note: EN Input Logic Low EN Input Logic High EN Input Leakage Output Turn-On Delay Output Turn-On Rise Time Output Turn-Off Delay Output Pull-Down Resistance Thermal Shutdown Temperature Thermal Recovery Temperature V V 0.8 0.01 40 100 4 150 160 140 1 80 150 10 250 180 160 A s s s YB1900 MRev.1.2 www.yobon.com.tw 3 YB1900 Ultra Low Quiescent Current Smart Load Switch Typical Performance Characteristics RDS(ON) vs. VIN 300 280 260 Quiescent Current vs. Input Voltage 2.5 RDS(ON) (mohm) 240 220 200 180 160 140 120 100 80 1.5 1.5A 1A 500m A 100m A 2A Quiescent Current( A ) 2 1.5 1 0.5 0 2 2.5 3 3.5 4 4.5 5 5.5 0 1 1 3 4 6 Input Voltage (V) VIN (V) RDS(O N) vs. Temperature 180 160 140 VIN=3V RDS(ON) (mohm) 120 100 80 60 40 20 0 25 40 55 70 85 100 VIN=5V Temperature ( ) YB1900 MRev.1.2 www.yobon.com.tw 4 YB1900 Ultra Low Quiescent Current Smart Load Switch Turn-On Transient Response (VIN=3V; RL=6) Turn-On Transient Response (VIN=5V; RL=10) Turn-Off Transient Response (VIN=3V; RL=6) Turn-Off Transient Response (VIN=5V; RL=10) YB1900 MRev.1.2 www.yobon.com.tw 5 YB1900 Ultra Low Quiescent Current Smart Load Switch Function Block Application Information The YB1900 featured very low quiescent current and very low RDS(ON) and making them ideal for battery-powered applications. The ENABLE control pin is TTL compatible and driven by 1.5V beyond making the YB1900 an ideal level-shifting load switch. Under normal conditions, there is a parasitic diode between the output & input of the load switch. In case of VOUT exceeding VIN, this would forward bias the internal parasitic diode and allow excessive current flow into the VOUT pin and possibly damage the load switch. In applications, where there is a possibility of VOUT exceeding VIN for brief periods of time during operation, the use of larger value CIN capacitor is highly recommended. A larger value of CIN with respect to COUT will affect a slower CIN decay rate during shutdown, thus preventing VOUT from exceeding VIN. In case of extended period of time for VOUT exceeding VIN, it is recommended to place a Schottky diode from VIN to VOUT. Input Capacitor Selection A 1F or larger input capacitor is recommended to prevent load transients from affecting upstream circuits. CIN should be located as close to the device VIN pin as practically. There is no specific requirement type of capacitor is recommended. However, for higher current operation, ceramic capacitors are recommended for CIN. Output Capacitor Selection For proper slew operation, a 0.1F or greater is recommended. The output capacitor has also no specific capacitor type requirement. If desired, COUT maybe increased without limit to accommodate any load transient Thermal Considerations The YB1900 is designed to deliver a continuous load current. The maximum limit is package power dissipation. At any given ambient temperature, the maximum package power dissipation can be determined by the following equation: PD(MAX) = [TJ(MAX)-TA] / JA 6 Reverse Output-to-Input Voltage Conditions and Protection YB1900 MRev.1.2 www.yobon.com.tw YB1900 Ultra Low Quiescent Current Smart Load Switch Constraints for the YB1900 are maximum junction temperature TJ(MAX) = 125, and package thermal resistance, JA = 220/W. The maximum continuous output current for YB1900 depends on package power dissipation and the RDS(ON) of MOSFET at TJ(MAX). Typical conditions are calculated under normal ambient condition where TA = 25 At 85, PD(MAX) = 181mW. At TA = 25, PD(MAX) = 454mW. The maximum current is calculated by the following equation: IOUT < (PD(MAX) / RDS(MAX))^(1/2) For example, if VIN = 5V, RDS(MAX) = 100m and TA = 25, IOUT(MAX) = 2.2A. Thermal Shutdown is employed to protect the device damage when over temperature 160. PCB Layout Consideration To maximize YB1900 performance, some board layout rules should be followed: VIN and VOUT should be routed using wider than normal traces, and GND should be connected to a ground plane. For best performance, CIN and COUT should be placed close to the package pins. YB1900 MRev.1.2 www.yobon.com.tw 7 YB1900 Ultra Low Quiescent Current Smart Load Switch Package Information (SOT23-5) All the contains in this datasheet are not assuming any responsibility for use of any circuitry described no circuit patent license are implied and Yobon reserves the right at any time without notice to change said circuitry and specifications. Yobon Inc. would like to receive your feedback with your recommends and suggestions that is always welcome and with our appreciations. YB1900 MRev.1.2 www.yobon.com.tw 8 |
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