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LM3243 Datasheet(PDF) 7 Page - Texas Instruments |
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LM3243 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 32 page  LM3243 www.ti.com SNVS782C – OCTOBER 2010 – REVISED AUGUST 2015 System Characteristics (continued) 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 VOUT = 3 V, TR = TF = 10 µs Load_tr Load transient response IOUT = 0 A to 1.2 A 40 mVpk MODE = LOW Maximum Duty Maximum duty cycle MODE = LOW 100% Cycle VIN = 3.2 V, VOUT = 1 V 100 160 IOUT = 10 mA, MODE = HIGH PFM_Freq Minimum PFM frequency kHz VIN = 3.2 V, VOUT = 0.5 V 34 55 IOUT = 5 mA, MODE = HIGH 6.7 Timing Requirements MIN MAX UNIT tSETUP Time for SW pin to become active upon power up; EN = LOW-to-HIGH 30 µs Turnon time (time for output to reach 90% of final value after EN LOW-to-HIGH tON transition) 50 µs EN = LOW-to-HIGH, VIN = 4.2 V, VCON = 1.36 V, VOUT = 3.4 V, IOUT ≤ 1 mA Time for VOUT to rise from 0 V to 3 V (90% or 2.7 V); 20 VIN = 4.2 V, RLOAD = 6.8 Ω, VCON = 0 V to 1.2 V Time for VOUT to fall from 3.6 V to 2.6 V (10% or 2.7 V) 20 VIN = 4.2 V, RLOAD = 6.8 Ω, VCON = 1.44 V to 1.04 V Time for VOUT to rise from 1.8 V to 2.8 V (90% or 2.7 V) 15 VIN = 4.2 V, RLOAD = 1.9 Ω, VCON = 0.72 V to 1.12 V tRESPONSE µs Time for VOUT to fall from 2.8 V to 1.8 V (10% or 1.9 V) 15 VIN = 4.2 V, RLOAD = 1.9 Ω, VCON = 1.12 V to 0.72 V Time for VOUT to rise from 0 V to 3.4 V (90% or 3.1 V) 20 VIN = 4.2 V, RLOAD = 1.9 Ω, VCON = 0 V to 1.36 V Time for VOUT to fall from 3.4 V to 0.4 V (10% or 0.7 V) 20 VIN = 4.2 V, RLOAD = 1.9 Ω, VCON = 1.36 V to 0.16 V Time for VOUT to rise from 0 V to PVIN after BP LOW-to-HIGH transition (90%) tBypass 20 µs VCON = 0 V, IOUT ≤ 1 mA Bypass turnon time. Time for VOUT to rise from 0 V to PVIN after EN LOW-to- tBypass, ON HIGH transition (90% or 3.24) 50 µs EN = VIN= 3.8 V, IOUT ≤ 1 mA Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM3243 |
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