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LM3224 Datasheet(PDF) 5 Page - Texas Instruments |
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LM3224 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 26 page LM3224 www.ti.com SNVS277B – DECEMBER 2004 – REVISED SEPTEMBER 2005 Electrical Characteristics Specifications in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating Temperature Range ( TJ = −40°C to +125°C). VIN = 2.7V, FSLCT = SHDN = VIN, and IL = 0A, unless otherwise specified. Min Typ Max Symbol Parameter Conditions Units (1) (2) (1) IQ Quiescent Current FB = 2V (Not Switching) 1.3 2.0 mA VSHDN = 0V 0.1 2.0 µA VFB Feedback Voltage 1.2285 1.26 1.2915 V ICL (3) Switch Current Limit VIN = 2.7V (4) 1.9 2.45 2.8 VIN = 3V, VOUT = 8V 2.1 A VIN = 3V, VOUT = 5V 2.2 %VFB/ΔVIN Feedback Voltage Line 2.7V ≤ VIN ≤ 7V 0.085 0.15 %/V Regulation IB FB Pin Bias Current (5) 35 250 nA ISS SS Pin Current 7.5 11 13 µA VSS SS Pin Voltage 1.2090 1.2430 1.2622 VIN Input Voltage Range 2.7 7 V gm Error Amp Transconductance ΔI = 5µA 40 87 135 µmho AV Error Amp Voltage Gain 78 V/V DMAX Maximum Duty Cycle 85 92.5 % fS Switching Frequency FSLCT = Ground 450 615 750 kHz FSLCT = VIN 0.9 1.25 1.5 MHz ISHDN Shutdown Pin Current VSHDN = 2.7V 2.4 5.0 µA VSHDN = 0.3V 0.3 1.2 IL Switch Leakage Current VSW = 20V 0.2 8.0 µA RDSON Switch RDSON VIN = 2.7V, ISW = 1A 0.15 0.4 Ω ThSHDN Shutdown Threshold Output High 1.2 0.8 V Output Low 0.8 0.3 V UVP On Threshold 2.3 2.5 V Off Threshold 2.6 2.7 V (1) All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely norm. (3) Duty cycle affects current limit due to ramp generator. (4) Current limit at 0% duty cycle. See Typical Performance Characteristics for Switch Current Limit vs. VIN (5) Bias current flows into FB pin. Copyright © 2004–2005, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3224 |
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