Datasheet LTM4634 (Analog Devices) - 4

LTM4634
elecTrical 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 = 24V, per the typical application for each regulator channel. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VPGOOD PGOOD Trip Level VFB With Respect to Set Output PGOOD12 VFB Ramping Negative –7.5 % PGOOD3 VFB Ramping Positive 7.5 % VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 28V, ICC = 0mA 4.8 5 5.2 V VLDOINT INTVCC Load Regulation ICC = 0mA to 100mA 1 % Float VEXTVCC EXTVCC Switchover Voltage MODE/PLLIN EXTVCC Ramping Positive l 4.5 4.7 V VLDOEXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 30 75 mV VLDOHYS EXTVCC Hysteresis 200 mV
Oscillator and Phase-Locked Loop
fSYNC SYNC Capture Range Clock Input Duty Cycle = 50% 250 750 kHz fS Switching Frequency VFREQ/PLLLPF = INTVCC 700 750 825 kHz RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ VIH(MODE/PLLIN) Clock Input Level High 2.0 V VIL(MODE/PLLIN) Clock Input Level Low 0.8 V Clock Phase VOUT2 to VOUT1 Phase VFREQ/PLLLPF = 1.2V (Note 3) 120 Deg VOUT3 to VOUT2 Phase 120 Deg VOUT1 to VOUT3 Phase 120 Deg VTEMP1,2 Temperature Diode Forward Voltage ITEMP = 100µA 0.598 V TC VTEMP Temperature Coefficient –2.0 mV/°C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
100% tested at wafer level. may cause permanent damage to the device. Exposure to any Absolute
Note 4:
See output current derating curves for different VIN, VOUT and TA. Maximum Rating condition for extended periods may affect device
Note 5:
High duty designs need to be validated based on maximum reliability and lifetime. temperature rise and derating in ambient conditions.
Note 2:
The LTM4634 is tested under pulsed load conditions such that TJ ≈ TA. The LTM4634E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications over the –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4634I is guaranteed to meet specifications over the –40°C to 125°C internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. 4634f 4 For more information www.linear.com/LTM4634 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Related Parts