YB1900 YOBON | Alldatasheet
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Technical content
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 R DS(on) at 100mΩ, 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 ava ilable 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 100 μs Very Low R DS(on), Typically 100mΩ Less than 1 μA shutdown current Output Voltage as low as 0.6V Very Low Quiescent Current, Typically 2μA 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 OUT EN GND COUT 0.1µF CIN 1µF YB1900 Figure1：Typical Application Circuit
Ultra Low Quiescent Current Smart Load Switch OUT GND VIN VIN SOT23-5 3EN Pin Configuration Figure2：YB1900 SOT23-5 Pin Assignment & Description Table1 Pin NAME Function 1 OUT Drain of P-channel Power MOSFET. 2 GND Ground Pin. Connect direct ly to local ground plane. 3 EN Enable Control Input. 4, 5 VIN Source of P-channel Power MOSFET.
Ordering Information
Order Number Package Type Supplied as Package Marking YB1900ST25 SOT23-5 3000 Units Tape & Reel Y9A
Ultra Low Quiescent Current Smart Load Switch Absolute Maximum Ratings (note 1) Recommended Operating Conditions (note 2) Thermal Resistance 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=25°C, unless otherwise noted) Symbol Description Test Conditions Min TYP MAX Units VIN Input Voltage 1.8 5 6.5 V IQ Quiescent Current V EN=1.5V 2 4 μA ISD Shutdown Current V EN=0V, OUT = Open 0.05 1 μA ISO Off Switch Current V EN=0V, VOUT = 0 0.05 1 μA VIN=5V @ 100mA 100 130 VIN=4.2V @ 100mA 110 140 VIN=3V @ 100mA 130 160 RDS(ON) On Resistance VIN=1.8V @ 100mA 200 250 mΩ VIL EN Input Logic Low R OUT = 10Ω 0.6 1 V VIH EN Input Logic High R OUT = 10Ω 0.4 0.8 V ISINK EN Input Leakage V EN=5.5V 0.01 1 μA TD(ON) Output Turn-On Delay R OUT = 10Ω 40 80 μs TON Output Turn-On Rise Time ROUT = 10Ω 100 150 μs TD(OFF) Output Turn-Off Delay R OUT = 10Ω 4 10 μs RPD Output Pull-Down Resistance VEN=0V 150 250 Ω TSD Thermal Shutdown Temperature 140 160 180 ℃ TR Thermal Recovery Temperature 120 140 160 ℃ Note:
Ultra Low Quiescent Current Smart Load Switch Typical Performance Characteristics RDS(ON) vs . V IN 100 120 140 160 180 200 220 240 260 280 300 Input Voltage (V) RDS(ON) (mohm) 500mA 100mA 1.5A Quiescent Current vs. Input Voltage 0.5 1.5 2.5 011346 VIN (V) Quiescent Current( μA ) RDS(O N) vs. Temperature 100 120 140 160 180 25 40 55 70 85 100 Temperature (℃) RDS(ON) (mohm) VIN=3V VIN=5V
Ultra Low Quiescent Current Smart Load Switch Turn-On Transient Response (VIN=3V; RL=6Ω) Turn-On Transient Response (VIN=5V; RL=10Ω) Turn-Off Transient Response (VIN=3V; RL=6Ω) Turn-Off Transient Response (VIN=5V; RL=10Ω)
Ultra Low Quiescent Current Smart Load Switch Function Block
Application Information
The YB1900 featured very low quiescent current and very low R DS(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. Input Capacitor Selection A 1 μF or larger input capacitor is recommended to prevent load transients from affecting upstream circuits. C IN should be located as close to the device V IN pin as practically. There is no specific requirement type of capacitor is recommended. However, for higher current operation, ceramic capacitors are recommended for C IN. Output Capacitor Selection For proper slew operation, a 0.1μF or greater is recommended. The output capacitor has also no specific capacitor type requirement. If desired, C OUT maybe increased without limit to accommodate any load transient Reverse Output-to-Input Voltage Conditions and Protection Under normal conditions, there is a parasitic diode between the output & input of the load switch. In case of V OUT exceeding V IN, 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 V IN for brief periods of time during operation, the use of larger value C IN capacitor is highly recommended. A larger value of C IN 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 V OUT exceeding VIN, it is recommended to place a Schottky diode from VIN to VOUT. 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: P D(MAX) = [TJ(MAX)-TA] / θJA
Ultra Low Quiescent Current Smart Load Switch Constraints for the YB1900 are maximum junction temperature T J(MAX) = 125 ℃, and package thermal resistance, θJA = 220℃/W. The maximum continuous output current for YB1900 depends on package power dissipation and the R DS(ON) of MOSFET at TJ(MAX). Typical conditions are calculated under normal ambient condition where T A = 25℃ At 85℃, PD(MAX) = 181mW. At TA = 25℃, PD(MAX) = 454mW. The maximum current is calculated by the following equation: I OUT < (PD(MAX) / RDS(MAX))^(1/2) For example, if V IN = 5V, R DS(MAX) = 100m Ω 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 V OUT should be routed using wider than normal traces, and GND should be connected to a ground plane. For best performance, C IN and C OUT should be placed close to the package pins.
Ultra Low Quiescent Current Smart Load Switch 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.