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LM3668-Q1 Datasheet(PDF) 5 Page - Texas Instruments |
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LM3668-Q1 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 24 page LM3668-Q1 www.ti.com SNVSA84A – APRIL 2015 – REVISED MAY 2015 6.5 Electrical Characteristics Unless otherwise noted, specifications apply to the LM3668-Q1. VOUT = 4.5V-5 V, VIN = 4 V. (1) (2) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VFB Feedback voltage −40°C ≤ TA ≤ 125°C, see (2) –3% 3% Switch peak current limit Open loop(3) 1.85 ILIM A Switch peak current limit Open loop(3), −40°C ≤ TA ≤ 125°C 1.6 2.05 Shutdown supply current EN = 0 V 0.01 ISHDN µA Shutdown supply current EN = 0 V, −40°C ≤ TA ≤ 125°C 1 No load, device is not switching (FB DC bias current in PFM forced higher than programmed output 45 voltage) IQ_PFM µA No load, device is not switching (FB forced higher than programmed output DC bias current in PFM 60 voltage) −40°C ≤ TA ≤ 125°C DC bias current in PWM PWM mode, no switching 600 IQ_PWM µA PWM mode, no switching DC bias current in PWM 750 −40°C ≤ TA ≤ 125°C RDSON(P) Pin-pin resistance for PFET Switches P1 and P2 130 180 m Ω RDSON(N) Pin-pin resistance for NFET Switches N1 and N2 100 150 m Ω PWM mode 2.2 FOSC Internal oscillator frequency MHz PWM mode, −40°C ≤ TA ≤ 125°C 1.9 2.5 FSYNC Sync frequency range VIN = 3.6 V 1.6 2.7 MHz Logic high input for EN, VIH −40°C ≤ TA ≤ 125°C 1.1 V MODE/SYNC pins Logic low input for EN, VIL −40°C ≤ TA ≤ 125°C 0.4 V MODE/SYNC pins 0.3 IEN, MODE, EN, MODE/SYNC pins input current µA SYNC −40°C ≤ TA ≤ 125°C 1 (1) All voltages with respect to SGND. (2) Minimum and Maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most likely norm. (3) Electrical Characteristics table reflects open loop data (FB = 0 V and current drawn from SW pin ramped up until cycle-by-cycle current limits is activated). Closed loop current limit is the peak inductor current measured in the application circuit by increasing output current until output voltage drops by 10%. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3668-Q1 |
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