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LM3243 Datasheet(PDF) 6 Page - Texas Instruments |
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LM3243 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 32 page  LM3243 SNVS782C – OCTOBER 2010 – REVISED AUGUST 2015 www.ti.com 6.6 System Characteristics The following spec table entries are specified by design and verifications providing the component values in the Typical System Application Diagram are used (L = 1.5 µH, DCR = 120 m Ω, TOKO DFE201610C-1R5N, CIN = 10 µF, 6.3 V, 0402, Samsung CL05A106MQ5NUN, COUT = 10 µF + 4.7 µF + 3 × 1 µF + 3300 pF: 6.3 V, 0402, Samsung CL05A106MQ5NUN, CL05A475MQNRN; 6.3 V, 0201 Samsung CL03A105MQ3CSN; 6.3 V, 01005 Murata GRM022R60J332K). These parameters are not verified by production testing. Minimum (MIN) and maximum (MAX) values are specified over the ambient temperature range TA = −30°C to 90°C. Typical (TYP) values are specified at PVIN = VDD = EN = 3.8 V, BP = 0 V and TA = 25°C unless otherwise stated. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VCON = 1.5 V Total dropout resistance in Rtot_drop Max value at VIN = 3.1 V 45 55 m Ω bypass mode Inductor ESR ≤ 151 mΩ Pin input capacitance for BP, CIN Test frequency = 100 KHz 5 pF EN, MODE Maximum load current in IOUT Switcher + ACB 2.5 PWM mode Maximum output transient IOUT, PU 3 A pullup current limit Switcher + ACB(1) PWM maximum output IOUT, PD, PWM −3 transient pulldown current limit Maximum output load current VIN = 3.8 V, VCON < 1 IOUT, MAX-PFM 85 mA in PFM mode MODE = HIGH(1) −3% 3% Linearity in control range of VIN = 4.2 V (2) Linearity VCON = 0.16 V to 1.44 V Monotonic in nature −50 50 mV VIN = 3.8 V, VOUT = 1.8 V IOUT = 10 mA 79% 82% MODE = HIGH (PFM) VIN = 3.8 V, VOUT = 0.5 V IOUT = 5 mA 58% 60% MODE = HIGH (PFM) VIN = 3.8 V, VOUT = 3.5 V IOUT = 1900 mA 89% 92% MODE = LOW (PWM) η Efficiency VIN = 3.8 V, VOUT = 2.5 V IOUT = 250 mA 90% 93% MODE = LOW (PWM) VIN = 3.8 V, VOUT = 1.6 V IOUT = 130 mA 83% 86% MODE = LOW (PWM) VIN = 3.8 V, VOUT = 1 V IOUT = 400 mA 81% 84% MODE = LOW (PWM) VIN = 0.4 V to 3.6 V Ripple voltage at no pulse VOUT = 0.4 V to 3.6 V, 1 3 skipping condition ROUT = 1.9 Ω (3) MODE = LOW Ripple voltage at pulse VIN = 5.5 V to dropout, VOUT = 3.6 V, 8 skipping condition ROUT = 1.9 Ω (3) VRIPPLE mVpp VIN = 3.2 V, VOUT < 1.125 V 50 IOUT =10 mA, MODE = HIGH PFM ripple voltage VIN = 3.2 V, VOUT ≤ 0.5 V, IOUT = 5 mA 50 MODE = HIGH VIN = 3.6 V to 4.2 V, TR = TF = 10 µs, Line_tr Line transient response VOUT = 1 V 50 mVpk IOUT = 600 mA, MODE = LOW (1) Current limit is built-in, fixed, and not adjustable. (2) Linearity limits are ±3% or ±50 mV, whichever is larger. (3) Ripple voltage should be measured at COUT electrode on a well-designed PC board and using the suggested inductor and capacitors. 6 Submit Documentation Feedback Copyright © 2010–2015, Texas Instruments Incorporated Product Folder Links: LM3243 |
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