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LM3279 Fiches technique(PDF) 7 Page - Texas Instruments |
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LM3279 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 31 page LM3279 www.ti.com SNVS970A – MARCH 2013 – REVISED MAY 2013 SYSTEM CHARACTERISTICS The following spec table entries are specified by design and verifications, providing the component values in the Typical Application Circuits are used: L = 1.5 µH, DFE201610C-1R5M (2016)/TOKO; CIN and COUT each = 10 µF 6.3V, C105A106MQ5NUNC (0402)/Samsung; PA decoupling cap emulation = 0.47 µF, GRM033R60J474ME90 (0201)/Murata. These parameters are not verified by production testing. Limits in standard typeface are TA = 25°C. Min and Max limits in boldface apply over the full ambient temperature range ( −30°C ≤ TA ≤ 85°C) and over the VIN range = 2.7V to 5.5V unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units VBATT = 3.8V, VIO = 1.8V, RFFE write VSET = 3.42V (VSET_CTRL = 5Fh), IOUT = 0mA Turn-on time (time for output TON 35 50 µs to reach 0V →90% × 3.4V) EN = L to H, VBATT = 3.8V, VCON = 1.14V, IOUT = 0 mA VBATT ≥ 3.0V, VOUT = 3.8V 750 IOUT_MAX Max output current mA VBATT ≥ 3.2V, VOUT = 4.2V 650 Boost (% M4 on) 50 DMAX Maximum duty cycle % Buck (% M1 on) 100 PFM: VOUT = 0.6V, PVIN = 3.7V FOSC_PFM Internal oscillator frequency 63 kHz IOUT = 13 mA Half speed readback SCLK = 13 MHz, not including CL Load capacitance 10 50 pF LM3279 capacitance. CVCON VCON input capacitance VCON = 1V, Test frequency = 100 kHz 10 pF VCON_LIN VCON linearity 0.2V ≤ VCON ≤ 1.4V −2.5 +2.5 % VIO VIO I/O voltage level 1.8V Bus 1.65 1.8 1.95 V VBATT ≥ 3.2V, 0.6 ≤ VOUT ≤ 4.2V, Ripple voltage 15 50 0 mA ≤ IOUT ≤ 430 mA VO_RIPPLE PFM ripple VOUT = 0.6V, IOUT = 5mA 40 mV Ripple voltage in mode VBATT = 3.0V to 5.0V, Tr = Tf = 30s 50 transition 3.3V ≤ VOUT ≤ 4.2V VBATT = 3.2V to 4.9V, VOUT = 3.5V, Line regulation 10 PWM Operation ΔVOUT mV IOUT = 0 mA to 500 mA, VBATT = 3.2V to 4.9V, Load regulation 20 PWM Operation VBATT = 3.6V to 4.2V, Tr = Tf = 10 µs, −100 +100 VOUT = 3.5V, RLOAD = 11.4Ω, PWM Line_tr Line transient response mV VBATT = 3.6V to 4.2V, Tr = Tf = 10 µs, −5 +5 VOUT = 0.8V, RLOAD = 20Ω, PFM IOUT = 1 mA to 200 mA, Tr = Tf = 1µs, −100 +100 VBATT = 4.2V, VOUT = 3.5V, PWM Load_tr Load transient response mV IOUT = 10 mA to 90 mA, Tr = Tf = 1µs, −10 +10 VBATT = 4.2V, VOUT = 0.8V, PFM VOUT transient response 200 mV overshoot VBATT = 3.2V to 4.2V, VOUT transient response rise VOUT_TR VOUT = 0.6V to 3.4V, Tr = Tf = 1µs, 20 time RLOAD = 5Ω µs VOUT transient response fall 50 time Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM3279 |
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