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PTH08T240W Datasheet(PDF) 6 Page - Texas Instruments |
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PTH08T240W Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 39 page  ELECTRICAL CHARACTERISTICS PTH08T240W, PTH08T241W SLTS264J – NOVEMBER 2005 – REVISED JUNE 2009 ................................................................................................................................................... www.ti.com PTH08T241W (Ceramic Capacitors) TA = 25°C, VI = 5 V, VO = 3.3 V, CI = 200 µF ceramic, CO = 300 µF ceramic, and IO = IO max (unless otherwise stated) PARAMETER TEST CONDITIONS PTH08T241W UNIT MIN TYP MAX IO Output current Over VO range 25°C, natural convection 0 10 A 0.69 ≤ VO ≤ 1.2 4.5 14 (1) VI Input voltage range Over IO range 1.2 < VO ≤ 3.6 4.5 14 V 3.6 < VO ≤ 5.5 VO + 2 14 VOADJ Output voltage adjust range Over IO range 0.69 5.5 V Set-point voltage tolerance ±0.5 ±1 (2) %Vo Temperature variation –40°C < TA < 85°C ±0.3 %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 ≤ TA ≤ 85°C ±1.5 (2) %Vo RSET = 171 Ω, VI = 8 V, VO = 5.0 V 95% RSET = 1.21 kΩ, VO = 3.3 V 94% RSET = 2.38 kΩ, VO = 2.5 V 92% η Efficiency IO = 10 A RSET = 4.78 kΩ, VO = 1.8 V 90% RSET = 7.09 kΩ, VO = 1.5 V 88% RSET = 12.1 kΩ, VO = 1.2 V 87% RSET = 20.8 kΩ, VO = 1.0 V 85% VO Ripple (peak-to-peak) 20-MHz bandwidth 10 (1) mVPP ILIM Overcurrent threshold Reset, followed by auto-recovery 20 A ttr Recovery time 35 µs w/o TurboTrans CO= 200 µF, TypeA ΔVtr 2.5 A/µs load step VO over/undershoot 165 mV Transient response 50 to 100% IOmax ttrTT w/ TurboTrans Recovery time 130 µs VO = 2.5 V CO= 1500 µF, TypeA mV ΔVtrTT VO over/undershoot 30 RTT = short IIL Track input current (pin 10) Pin to GND –130(3) 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 3.7 4.2 V (pin 11) Hysteresis, RUVLO ≤ 52.3 kΩ 0.5 Input high voltage (VIH) Open(4) V Inhibit control (pin 11) Input low voltage (VIL) -0.2 0.8 Input low current (IIL ), Pin 11 to GND -235 µA Iin Input standby current Inhibit (pin 11) to GND, Track (pin 10) open 5 mA f s Switching frequency Over VI and IO ranges, SmartSync (pin 1) to GND 300 kHz Synchronization (SYNC) fSYNC 240 400 kHz frequency VSYNCH SYNC High-Level Input Voltage 2 5.5 V VSYNCL SYNC Low-Level Input Voltage 0.8 V tSYNC SYNC Minimum Pulse Width 200 nSec (1) For output voltages ≤ 1.2 V, at nominal operating frequency, the output ripple may increase (typically 2×) when operating at input voltages greater than (VO × 11). When using the SmartSync feature to adjust the switching frequency, see the SmartSync Considerations section of the datasheet for further guidance. (2) 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. (3) A low-leakage (<100 nA), open-drain device, such as MOSFET or voltage supervisor IC, is recommended to control pin 10. The open-circuit voltage is less than 8 Vdc. (4) 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 note. 6 Submit Documentation Feedback Copyright © 2005–2009, Texas Instruments Incorporated Product Folder Link(s): PTH08T240W PTH08T241W |
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