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PTH08T261WAST Datasheet(PDF) 6 Page - Texas Instruments |
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PTH08T261WAST Datasheet(HTML) 6 Page - Texas Instruments |
6 / 36 page www.ti.com ELECTRICAL CHARACTERISTICS PTH08T260W, PTH08T261W SLTS272A – DECEMBER 2006 – REVISED MAY 2007 T A =25°C, VI = 5 V, VO = 3.3 V, CI = 330 µF, CO1 = 200 µF ceramic, and IO = IO max (unless otherwise stated) PARAMETER TEST CONDITIONS PTH08T261W MIN TYP MAX UNIT IO Output current Over VO range 25 °C, natural convection 0 3 A 11 × 0.69 ≤ V O≤ 1.2 4.5 VO(1) VI Input voltage range Over IO range V 1.2 < VO≤ 3.6 4.5 14 3.6 < VO≤ 5.5 VO +1(2) 14 Output adjust range Over IO range 0.69 5.5 V Set-point voltage tolerance ±1.0 (3) %Vo Temperature variation –40 °C < T A < 85°C ±0.25 %Vo VO Line regulaltion Over VI range ±3 mV Load regulation Over IO range ±2 mV Total output variation Includes set-point, line, load, –40 °C ≤ T A ≤ 85°C ±1.5 (3) %VO RSET = 169 Ω, VI = 8.0 V, VO = 5.0V 95% RSET = 1.21 kΩ, VO = 3.3 V 92% RSET = 2.37 kΩ, VO = 2.5 V 90% RSET = 4.75 kΩ, VO = 1.8 V 88% η Efficiency IO = 3 A RSET = 6.98 kΩ, VO = 1.5 V 87% RSET = 12.1 kΩ, VO = 1.2 V 85% RSET = 20.5 kΩ, VO = 1.0 V 83% RSET = 681 Ω, VO = 0.7 V 79% VO Ripple (peak-to-peak) 20-MHz bandwidth 1 %VO ILIM Overcurrent threshold Reset, followed by auto-recovery 5.5 A Recovery Time 50 µSec w/o TurboTrans CO1 = 200 µF, ceramic VO Overshoot 43 mV 2.5 A/µs load step Recovery Time 70 µSec w/o TurboTrans (4) 50% to 100% IOmax Transient response CO1 = 400 µF, ceramic VI = 12 V VO Overshoot 38 mV VO = 3.3 V with TurboTrans Recovery Time 130 µSec CO1 = 400 µF, ceramic VO Overshoot 23 mV RTT = 8.06 kΩ IIL Track input current (pin 9) Pin to GND -130 (5) µA dVtrack/dt Track slew rate capability CO ≤ CO (max) 1 V/ms VI increasing, RUVLO = OPEN 4.3 4.45 Adjustable Under-voltage lockout UVLOADJ VI decreasing, RUVLO = OPEN 4.0 4.2 V (pin 10) Hysteresis, RUVLO≤ 52.3 kΩ 0.5 Input high voltage (VIH) Open(6) V Inhibit control (pin 10) Input low voltage (VIL) -0.2 0.6 Input low current (IIL), Pin 10 to GND 235 µA Iin Input standby current Inhibit (pin 10) to GND, Track (pin 9) open 5 mA f s Switching frequency Over VI and IO ranges, SmartSync (pin 1) to GND 300 kHz (1) The maximum input voltage is duty cycle limited to (VO× 11)V or 14V, whichever is less. The maximum allowable input voltage is a function of switching frequency, and may increase or decrease when the SmartSync feature is used. Please review the SmartSync section of the Application Information for further guidance. (2) The minimum input voltage is 4.5V or (VO+1)V, whichever is greater. Additional input capacitance may be required when VI < (VO+2)V. (3) The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1% with 100 ppm/°C or better temperature stability. (4) Without TurboTrans, the minimum ESR limit of 7 m Ω must not be violated. (5) A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 9. The open-circuit voltage is less than 6.5 Vdc. (6) This control pin has an internal pull-up. Do not place an external pull-up on this pin. If it is left open-circuit, the module operates when input power is applied. A small, low-leakage (<100 nA) MOSFET is recommended for control. For additional information, see the related application information section. 6 Submit Documentation Feedback |
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