Datasheet LTM4637 (Analog Devices) - 4

LTM4637
e lecTrical characTerisTics The
l
denotes the specifications which apply over the specified internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 12V, per the typical application in Figure 22. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V + OS Input Offset Voltage VOSNS = VDIFF_OUT = 1.5V, IDIFF_OUT = 100µA 2 mV AV Differential Gain (Note 7) 1 V/V SR Slew Rate (Note 6) 2 V/µs GBP Gain Bandwidth Product (Note 6) 3 MHz CMRR Common Mode Rejection (Note 7) 60 dB IDIFF_OUT DIFF_OUT Current Sourcing 2 mA PSRR Power Supply Rejection 5V < VIN < 20V (Note 7) 100 dB Ratio RIN Input Resistance VOSNS+ to GND 80 kΩ
PGOOD Output
VPGOOD PGOOD Trip Level VFB With Respect to Set Output VFB Ramping Negative –10 % VFB Ramping Positive 10 % VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 20V 4.8 5 5.2 V VINTVCC Load Reg INTVCC Load Regulation ICC = 0 to 50mA 0.5 % VEXTVCC External VCC Switchover EXTVCC Ramping Positive l 4.5 4.7 V VLDO Ext EXTVCC Voltage Drop ICC = 25mA, VEXTVCC = 5V 50 100 mV
Oscillator and Phase-Locked Loop
fSYNC Frequency Sync Capture MODE_PLLIN Clock Duty Cycle = 50% 250 800 kHz Range fNOM Nominal Frequency VfSET = 1.2V 450 500 550 kHz fLOW Lowest Frequency VfSET = 0V 210 250 290 kHz fHIGH Highest Frequency VfSET ≥ 2.4V 700 770 850 kHz IFREQ Frequency Set Current 9 10 11 µA RMODE_PLLIN MODE_PLLIN Input 250 kΩ Resistance VIH_MODE_PLLIN Clock Input Level High 2.0 V VIL_MODE_PLLIN Clock Input Level Low 0.8 V
Temperature Diode
VTEMP TEMP Diode Voltage ITEMP = 100µA 0.6 V TC VTEMP Temperature Coefficient l –2.0 mV/°C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings determined by specific operating conditions in conjunction with board may cause permanent damage to the device. Exposure to any Absolute layout, the rated package thermal resistance and other environmental Maximum Rating condition for extended periods may affect device factors. reliability and lifetime.
Note 3:
The minimum on-time condition is specified for a peak-to-peak
Note 2:
The LTM4637 is tested under pulsed load conditions such that inductor ripple current of ~40% of IMAX Load. (See the Applications TJ ≈ TA. The LTM4637E is guaranteed to meet performance specifications Information section) over the 0°C to 125°C internal operating temperature range. Specifications
Note 4:
See output current derating curves for different VIN, VOUT and TA. over the –40°C to 125°C internal operating temperature range are assured
Note 5:
Limit current into the RUN pin to less than 2mA. by design, characterization and correlation with statistical process
Note 6:
Guaranteed by design. controls. The LTM4637I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. Note that the
Note 7:
100% tested at wafer level. maximum ambient temperature consistent with these specifications is 4637fc 4 For more information www.linear.com/LTM4637 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package PHOTO Typical Application Related Parts Design Resources