Datasheet LTC3026 (Analog Devices) - 4

LTC3026
elecTrical characTerisTics (BOOST ENABLED or DISABLED) The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TJ = 25°C. VIN = 1.5V, VOUT = 1.2V, CIN = CBST = 1µF, COUT = 10µF (all capacitors ceramic) unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIHSHDN SHDN Input High Voltage 1.14V ≤ VIN ≤ 3.5V l 1.0 V 3.5V ≤ VIN ≤ 5.5V l 1.2 V VILSHDN SHDN Input Low Voltage 1.14V ≤ VIN ≤ 5.5V l 0.4 V IIHSHDN SHDN Input High Current SHDN = VIN –1 1 µA IILSHDN SHDN Input Low Current SHDN = 0V –1 1 µA VOLPG PG Output Low Voltage IPG = 2mA l 0.1 0.4 V IOHPG PG Output High Leakage Current VPG = 5.5V 0.01 1 µA PG Output Threshold (Note 4) PG High to Low –12 –9 –6 % PG Low to High –10 –7 –4 %
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
Dropout voltage is minimum input to output voltage differential may cause permanent damage to the device. Exposure to any Absolute needed to maintain regulation at a specified output current. In dropout, the Maximum Rating condition for extended periods may affect device output voltage will be equal to VIN – VDROPOUT. reliability and lifetime. This IC has overtemperature protection that is
Note 7:
To maintain correct regulation intended to protect the device during momentary overload conditions. V Junction temperatures will exceed 125°C when overtemperature is active. OUT ≤ VBST – 2.4V Continuous operation above the specified maximum operating junction
Note 8:
The LTC3026 is tested under pulsed load conditions such temperature may impair device reliability. that TJ ≈ TA. The LTC3026E is guaranteed to meet specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to
Note 2:
Minimum Operating Voltage required for regulation is: 125°C operating junction temperature range are assured by design, VIN ≥ VOUT(MIN) + VDROPOUT characterization and correlation with statistical process controls. The
Note 3:
When using BST to drive loads other than LTC3026s, the load LTC3026I is guaranteed over the –40°C to 125°C operating junction must be high impedance during start-up (i.e. prior to PG going high). temperature range. Note that the maximum ambient temperature
Note 4:
PG threshold expressed as a percentage difference from the consistent with these specifications is determined by specific operating “VADJ Regulation Voltage” as given in the table. conditions in conjunction with board layout, the rated package thermal
Note 5:
Operating conditions are limited by maximum junction temperature. impedance and other environmental factors. The junction temperature The regulated output voltage specification will not apply for all possible (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and combinations of input voltage and output current. When operating at power dissipation (PD, in watts) according to the formula: maximum input voltage, the output current range must be limited. When TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal operating at maximum output current, the input voltage range must be limited. impedance.
Typical perForMance characTerisTics IN Supply Current with Boost BST Supply Current with Boost IN Supply Current with Boost Converter Enabled Converter Disabled Converter Disabled
1.50 200 200 1.25 150 150 1.00 0.75 (µA) 100 (µA) 100 I BST I IN 0.50 INPUT CURRENT (mA) VBST = 5V VBST = 5V 50 –40°C 50 –40°C 0.25 –40°C 25°C 25°C 25°C 85°C 85°C 85°C 125°C 125°C 0 0 0 1.0 1.5 2.0 2.5 3.0 3.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VIN (V) VIN (V) VIN (V) 3026 G01 3026 G02 3026 G03 3026ff 4 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts