Datasheet LTM4691 (Analog Devices) - 4

link to page 3 LTM4691
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 3.3V, per the typical application. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IRUN1,2 RUN Pin Leakage Current RUN = 3.6V ±100 nA VIN Quiescent VIN = 3.6V, RUN = 0V 1.5 μA Current in Shutdown IQ(VIN) with Both Input Supply Bias Current VOUT = 1.5V, MODE/SYNC = VIN 85 μA Bucks Enabled MODE/SYNC = GND 2.6 mA MODE/SYNC = FLOAT 32 mA IOUT1,2(DC) Output Continuous Current Range VOUT = 1.5V (Note 4) 0 2 A ∆VOUT1(LINE)/VOUT1 Line Regulation Accuracy VOUT = 1.5V, VIN = 2.25V to 3.6V, IOUT = 0A l 0.001 0.5 %/V ∆VOUT2(LINE)/VOUT2 ∆VOUT1(LOAD)/VOUT1 Load Regulation Accuracy VOUT = 1.5V, IOUT = 0A to 2A l 0.2 1.5 % ∆VOUT2(LOAD)/VOUT2 VIN = 2.5V VOUT1,2(AC) Output Ripple Voltage IOUT = 0A, COUT = 22μF Ceramic 5.5 mV VIN = 3.3V, VOUT = 1.5V ∆VOUT(START) Turn-On Overshoot IOUT = 0A, COUT = 22μF Ceramic 12 mV (Each Channel) VIN = 3.3V, VOUT = 1.5V tSTART Turn-On Time COUT = 22μF Ceramic, 1 ms (Each Channel) No Load, VIN = 3.3V, VOUT = 1.5V (Note 4) ∆VOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load 55 mV (Each Channel) COUT = 100μF Ceramic, VIN = 3.3V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load 25 μs (Each Channel) COUT = 100μF Ceramic, VIN = 3.3V, VOUT = 1.5V IOUT1PK, IOUT2PK Output Current Limit VIN = 3.3V, VOUT = 1.5V 2.8 A VFB1,2 Voltage at FB Pin IOUT = 0A, VOUT = 1.5V l 0.495 0.50 0.505 V IFB1,2 Current at FB Pin ±20 nA PGOOD PGOOD Rising Threshold As a Percentage of the Regulated VFB 2.5 3.5 % Threshold/HYS PGOOD Hysteresis 1.1 % Overvoltage Rising Threshold 10 14 % Overvoltage Hysteresis 2 % IPGOOD Internal PGOOD Leakage VPGOOD = 3.6V ±100 nA fOSC Oscillator Frequency 2 MHz MODE/SYNC Programming Pulse-Skipping Mode l 0.1 V Threshold Programming Burst Mode Operation l VIN V – 0.1 SYNC_RANGE SYNC Frequency Range 1 3 MHz SYNC_LEVEL Clock Level High on SYNC 1.2 V Clock Level Low on SYNC 0.4 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings controls. The LTM4691I is guaranteed to meet specifications over the may cause permanent damage to the device. Exposure to any Absolute full –40°C to 125°C internal operating temperature range. Note that the Maximum Rating condition for extended periods may affect device maximum ambient temperature consistent with these specifications is reliability and lifetime. determined by specific operating conditions in conjunction with board
Note 2:
. The LTM4691 is tested under pulsed load conditions such that layout, the rated package thermal resistance and other environmental T factors. J ≈ TA. The LTM4691E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications
Note 3:
See output current derating curves for different VIN, VOUT and TA. over the full –40°C to 125°C internal operating temperature range are
Note 4:
Guaranteed by design. assured by design, characterization and correlation with statistical process Rev. 0 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information VIN to VOUT Step-Down Ratios Output Voltage Programming Input Decoupling Capacitors Output Decoupling Capacitors Mode Selection Operating Frequency and External Synchronization Power GOOD Output Overvoltage Protection Output Voltage Soft-Start Dropout Operation Output Short-Circuit Protection and Recovery Load Sharing Using the Precision RUN Threshold Thermal Considerations and Output Current Derating Safety Considerations Layout Checklist/Example Applications Information Typical Applications Pin Configuration Table LTM4691 Component LGA Pinout Package Description Package Photo Related Parts