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TPS62730_1107 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS62730_1107 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 27 page ON/BYP STAT VOUT TPS62730 SLVSAC3 – MAY 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 3.0V, VOUT = 2.1V, ON/BYP = VIN, TA = –40°C to 85°C typical values are at TA = 25°C (unless otherwise noted), CIN = 2.2 μF, L = 2.2μH, COUT = 2.2μF, see parameter measurement information PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OUTPUT VREF Internal Reference Voltage 0.70 V VIN = 3.0V TA = 25°C –1.5 0 1.5 % VOUT Feedback Voltage Comparator Threshold Accuracy TA = –40°C to 85°C –2.5 0 2.5 VVOUT DC output voltage load regulation IOUT = 1mA to 50mA VIN = 3.0V, VOUT = 2.1 -0.01 %/mA V DC output voltage line regulation IOUT = 20 mA, 2.4V ≤ VIN ≤ 3.9V 0.01 %/V ILK_SW Leakage current into SW pin VIN = VOUT = VSW = 3.0 V, ON/Byp= GND 0.0 100 nA (2) (2) The internal resistor divider network is disconnected from VOUT pin. PIN FUNCTIONS PIN I/O DESCRIPTION NAME NO VIN 3 PWR VIN power supply pin. Connect this pin close to the VIN terminal of the input capacitor. A ceramic capacitor of 2.2 µF is required. GND 4 PWR GND supply pin. Connect this pin close to the GND terminal of the input and output capacitor. ON/BYP 5 IN This is the mode selection pin of the device. Pulling this pin to low forces the device into ultra low power bypass mode. The output of the DC/DC converter is connected to VIN via an internal bypass switch. Pulling this pin to high enables the DC/DC converter operation. This pin must be terminated and is controlled by the system. In case of CC2540, connect this to the power down signal which is output on one of the P1.x ports (see CC2540 user guide). SW 2 OUT This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this terminal. VOUT 6 IN Feedback Pin for the internal feedback divider network and regulation loop. The internal bypass switch is connected between this pin and VIN. Connect this pin directly to the output capacitor with short trace. STAT 1 OUT This is the open drain status output with active low level. An internal comparator drives this output. The pin is high impedance with ON/BYP = low. With ON/BYP set to high the device and the internal VOUT comparator becomes active. The STAT pin is set to low once the output voltage is higher than 93% of nominal VOUT and high impedance once it is below this threshold. If not used, this pin can be left open. 4 Copyright © 2011, Texas Instruments Incorporated |
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