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LM2770 Datasheet(PDF) 5 Page - Texas Instruments |
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LM2770 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 20 page LM2770 www.ti.com SNVS318E – NOVEMBER 2004 – REVISED MAY 2013 Electrical Characteristics (1)(2) (continued) Limits in standard typeface are for TJ = 25ºC. Limits in boldface type apply over the full operating junction temperature range (-30°C ≤ TJ ≤ +105°C) . Unless otherwise noted, specifications apply to the LM2770 Typical Application Circuit (pg. 1) with: VIN = 3.6V; V(EN) = VSEL = 1.8V, V(SLEEP) = 0V, CIN = COUT = 10µF, C1 = C2 = 1.0µF. (3) Symbol Parameter Condition Min Typ Max Units Specifications Below Apply to All LM2770 Options VIN = 3.6V, IOUT = 150mA E Power Efficiency 82 % VOUT =1.5V Average Eficiency over Li-Ion Input 3.0V ≤ VIN ≤ 4.2V EAVG 73 % Voltage Range(4) IOUT = 200mA, VOUT = 1.5V 2.7V ≤ VIN ≤ 5.5V Quiescent Supply Current: Full- IQ IOUT = 0mA 55 75 µA power Mode V(SLEEP) = 0V 2.7V ≤ VIN ≤ 5.5V Quiescent Supply Current: Sleep ISLEEP IOUT = 0mA 50 65 µA Mode V(SLEEP) = 1.8V 2.7V ≤ VIN ≤ 5.5V ISD Shutdown Current 0.1 0.5 µA V(EN) = 0V 0V ≤ VOUT ≤ 0.2V ICL Current Limit - Sleep Mode 60 mA V(SLEEP) = 1.8V tON Turn-on Time VIN = 3.6V, COUT = 10µF 200 µs FSW Switching Frequency 2.7V ≤ VIN ≤ 5.5V 475 700 925 kHz Logic Pin Specifications: EN, ENA, ENB VIL Logic-low Input Voltage 2.7V ≤ VIN ≤ 5.5V 0 0.4 V VIH Logic-high Input Voltage 2.7V ≤ VIN ≤ 5.5V 1.0 VIN V Logic-high Input Current: SLEEP IIH Logic Input = 3.0V 0.1 µA and VSEL pins IIH-EN Logic-high Input Current: EN pin(5) V(EN) = 1.8V 6 µA Logic-low Input Current: All Logic IIL Logic Input = 0V 0 µA Pins (4) Efficiency is measured versus VIN, with VIN being swept in small increments from 3.0V to 4.2V. The average is calculated from these measurement results. Weighting to account for battery voltage discharge characteristics (VBAT vs. Time) is not done in computing the average. (5) There is a 300k Ω pull-down resistor connected internally between the EN pin and GND. Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2770 |
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