SC196ULTRT Semtech, SC196ULTRT Datasheet
SC196ULTRT
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SC196ULTRT Summary of contents
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... Personal media players Microprocessor/DSP core/IO power PDAs and handheld computers WLAN peripherals USB powered modems 1 Li-Ion or 3 NiMH/NiCd powered devices L1 4.7μH SC196 VIN LX VOUT PVIN MODE ADJ EN SYNC/PWM PGND GND 1 SC196 IN V OUT <0. 1.5A C FB1 R 10pF FB1 C OUT R FB2 22μF www.semtech.com ...
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... Unless otherwise noted 3.6V 1.8V OUT Parameter Symbol Input Voltage Range UVLO Threshold (upper) UVLO Hysteresis V Output Voltage Range FB Voltage Tolerance Load Regulation (PWM) V PSAVE Regulation V P-Channel Current Limit Quiescent Current Shutdown Current © 2007 Semtech Corp. Symbol OUT V ADJ V LX θ ( ...
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... SYNC Frequency (upper) SYNC Frequency (lower) Start-Up Time Thermal Shutdown Thermal Shutdown Hysteresis T Logic Input High (1) Logic Input Low (1) Logic Input Current High (1) Logic Input Current Low (1) Note: (1) For EN, SYNC/PWM, MODE © 2007 Semtech Corp. Conditions 100mA DSP 100mA DSN GND GND LXP ...
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... Semtech Corp. Ordering Information DEVICE SC196ULTRT SC196EVB Ordering Information Notes Lead-free packaging only. This product is fully WEEE and RoHS compliant. 2) Available in tape and reel only. A reel contains 3000 devices. ...
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... Inductor connection to the switching FETs THERMAL Pad for heatsinking purposes T PAD multiple vias. © 2007 Semtech Corp. for forced PWM mode or GND to allow the part select 100% duty cycle function, MODE = GND to disable IN — not connected internally. Connects to ground plane using ...
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... POWER MANAGEMENT Block Diagram EN 4 SYNC OSC & Slope 3 /PWM Generator 500mV Ref 7 MODE 2 VIN 6 ADJ © 2007 Semtech Corp. Plimit Amp Control PWM Comp PSAVE Error Amp Comp 6 SC196 PRELIMINARY 1 Current Amp 10 Logic Nlimit Amp www.semtech.com PVIN LX PGND GND VOUT ...
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... OUT R = feedback resistor from VOUT to ADJ (Ω) FB1 R = feedback resistor from ADJ to GND (Ω) FB2 Resistors with 1% or better tolerance are recommended to ensure voltage accuracy. © 2007 Semtech Corp. Table 1 — Recommended ADJ Resistor Combinations V (V) R (kΩ) OUT FB2 1 200 1 ...
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... V falls from the upper to lower levels OUT in this low current state as the load current discharges © 2007 Semtech Corp. the output capacitor. The burst-to-off period in PSAVE will decrease as the load current reduces. The PSAVE switching burst frequency is controlled so that the inductor current ripple is similar to that in PWM mode ...
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... To prevent large input voltage ripple, a low ESR ceramic capacitor is required. A minimum value of 10μF should be used for input voltage fi ltering, while a 22μF capacitor is recommended for improved input voltage fi ltering. © 2007 Semtech Corp. Table 1 — Recommended Inductors Rated Value DCR ...
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... Feed-Forward Compensation Capacitor A small 10pf compensation capacitor ensure correct operation. This capacitor should be connected directly across feedback resistor R Capacitors with X7R or X5R ceramic dielectric are strongly recommended for their superior temperature characteristics. © 2007 Semtech Corp. Case Size X5R 0805 X5R 1210 X5R ...
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... GND V IN SYNC/PWM EN MODE GND © 2007 Semtech Corp. 2. Route the output voltage feedback path away from the inductor and LX node to minimize noise and magnetic interference. Keep R to avoid noise pickup. 3. Maximize ground metal on the component side to improve the return connection and thermal dissipation. ...
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... I (A) OUT Effi ciency vs. Input Voltage I =750mA (PWM) / 50mA (PSAVE OUT FB1 100 =1.0V PWM OUT 2.4 2.8 3.2 3.6 4.0 V (V) IN © 2007 Semtech Corp. = 3.3V OUT 100 =3.2V PWM 60 =4.2V PWM 50 =5.0V PWM 0 0.0001 = 1.8V OUT 100 =2.7V PWM ...
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... Quiescent Current vs. Input Voltage, PSAVE Mode PSAVE Mode 85° 25° -40° 2 (V) IN © 2007 Semtech Corp. IN 1.82 1.815 1.81 1.805 1.8 1.795 1.79 1.785 4.8 5.2 5.6 6 =1.8V OUT 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0 100 Quiescent Current vs. Input Voltage, PWM Mode 5 ...
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... T (°C) J PSAVE Operation V =3.6V, V =1.8V, I =150mA, PSAVE IN OUT OUT V (50mV/div) OUT I (500mA/div (2V/div) LX Time (2μs/div) © 2007 Semtech Corp. 0.22 0.20 T =85° 0.18 T =25° 0.16 T =-40° 0.14 0.12 0.10 4.7 5.2 V =5. (20mV/div) OUT I ...
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... I (500mA/div) OUT Time (400μs/div) Load Transient Response-3 V =3.6V, V =1.8V, I =10mA to 1.5A, PSAVE IN OUT OUT V (200mV/div) OUT I (500mA/div) OUT Time (400μs/div) © 2007 Semtech Corp. PWM Start-up V =3.6V, V =1.8V, I =1.5A, PWM IN OUT OUT V (5V/div (1V/div) OUT I (500mA/div) IN Time (1ms/div) Load Transient Response ...
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... Table 1. PWM-only mode operation is selected by connecting the SYNC/PWM pin to the VIN pin. The 100% duty cycle capability is selected by connecting the MODE pin to the VIN pin. A 10μF capacitor is selected for the output, as PSAVE operation is not required in this application. © 2007 Semtech Corp. L1 4.7μH ...
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... POWER MANAGEMENT Outline Drawing — MLPD-UT10 3x3x0.6 A PIN 1 INDICATOR (LASER MARK) aaa C 1 LxN N e NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS. © 2007 Semtech Corp SEATING PLANE bxN bbb PRELIMINARY DIMENSIONS INCHES MILLIMETERS ...
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... COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. THERMAL VIAS IN THE LAND PATTERN OF THE EXPOSED PAD SHALL BE CONNECTED TO A SYSTEM GROUND PLANE. FAILURE MAY COMPROMISE THE THERMAL AND/OR FUNCTIONAL PERFORMANCE OF THE DEVICE Contact Information Phone: (805) 498-2111 FAX (805) 498-3804 © 2007 Semtech Corp. K DIM ...