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TPS7248Y Datasheet(PDF) 7 Page - Texas Instruments |
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TPS7248Y Datasheet(HTML) 7 Page - Texas Instruments |
7 / 37 page TPS7201Q, TPS7225Q, TPS7230Q TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS SLVS102G – MARCH 1995 – REVISED JUNE 2000 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS7201Q electrical characteristics, IO = 10 mA, VI = 3.5 V, EN = 0 V, CO = 4.7 µF (CSR† = 1 Ω), FB shorted to OUT at device leads (unless otherwise noted) PARAMETER TEST CONDITIONS‡ TJ TPS7201Q UNIT PARAMETER TEST CONDITIONS‡ TJ MIN TYP MAX UNIT Reference voltage (measured VI = 3.5 V, IO = 10 mA 25 °C 1.188 V g( at FB with OUT connected to FB) 3 V ≤ VI ≤ 10 V, See Note 2 5 mA ≤ IO ≤ 250 mA, –40 °C to 125°C 1.152 1.224 V Reference voltage temperature coefficient –40 °C to 125°C 31 75 ppm/ °C VI = 2.4 V,§ 50 µA ≤ IO ≤ 100 mA 25 °C 2.1 VI = 2.4 V,§ 100 mA ≤ IO ≤ 200 mA 25 °C 2.9 Pass-element series VI =2 9V 50 µA ≤ IO ≤ 250 mA 25 °C 1.6 2.7 Ω resistance (see Note 3) VI = 2.9 V, 50 µA ≤ IO ≤ 250 mA –40 °C to 125°C 4.5 Ω VI = 3.9 V, 50 µA ≤ IO ≤ 250 mA 25 °C 1 VI = 5.9 V, 50 µA ≤ IO ≤ 250 mA 25 °C 0.8 Input regulation VI = 3 V to 10 V, 50 µA ≤ IO ≤ 250 mA, 25 °C 23 mV Input regulation I , See Note 2 µ O , –40 °C to 125°C 36 mV IO = 5 mA to 250 mA, 3 V ≤ VI ≤ 10 V, 25 °C 15 25 Output regulation O , See Note 2 I , –40 °C to 125°C 36 mV Output regulation IO = 50 µA to 250 mA, 3 V ≤ VI ≤ 10 V, 25 °C 17 27 mV O µ , See Note 2 I , –40 °C to 125°C 43 IO =50 µA 25 °C 49 60 Ripple rejection f = 120 Hz IO = 50 µA –40 °C to 125°C 32 dB Ripple rejection f = 120 Hz IO = 250 mA, 25 °C 45 50 dB O , See Note 2 –40 °C to 125°C 30 Output noise spectral density f = 120 Hz 25 °C 2 µV/√Hz 10 H ≤ f ≤ 100 kH CO = 4.7 µF 25 °C 235 Output noise voltage 10 Hz ≤ f ≤ 100 kHz, CSR† =1 Ω CO = 10 µF 25 °C 190 µVrms CSR† = 1 Ω CO = 100 µF 25 °C 125 PG trip-threshold voltage¶ VFB voltage decreasing from above VPG –40 °C to 125°C 0.95 × VFB(nom) V PG hysteresis voltage¶ Measured at VFB 25 °C 12 mV PG output low voltage¶ IPG = 400 µA VI = 2 13 V 25 °C 0.1 0.4 V PG output low voltage¶ IPG = 400 µA, VI = 2.13 V –40 °C to 125°C 0.4 V FB input current 25 °C –10 0.1 10 nA FB input current –40 °C to 125°C –20 20 nA † CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO. ‡ Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must be taken into account separately. § This voltage is not recommended. ¶ Output voltage programmed to 2.5 V with closed-loop configuration (see application information). NOTES: 2. When VI < 2.9 V and IO > 100 mA simultaneously, pass element rDS(on) increases (see Figure 10) to a point such that the resulting dropout voltage prevents the regulator from maintaining the specified tolerance range. 3. To calculate dropout voltage, use equation: VDO = IO ⋅ rDS(on) rDS(on) is a function of both output current and input voltage. The parametric table lists rDS(on) for VI = 2.4 V, 2.9 V, 3.9 V, and 5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V, respectively. For other programmed values, refer to Figures 10 and 11. |
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