ISL9007IUNZ-T Intersil, ISL9007IUNZ-T Datasheet - Page 7

• Manufacturer Part Number: ISL9007IUNZ-T
• Description: IC REG LDO LOW NOISE 3.3V 8-MSOP
• Manufacturer: Intersil

Specifications of ISL9007IUNZ-T

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 6.5V
• Voltage - Dropout (typical): 0.2V @ 400mA
• Number Of Regulators: 1
• Current - Output: 400mA (Max)
• Current - Limit (min): 470mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISL9007IUNZ-TTR

capacitor value above 4.7µF is not recommended as LDO
performance improvement is minimal.
Soft-start circuitry integrated into each LDO limits the initial
ramp-up rate to about 30µs/V to minimize current surge. The
ISL9007 provides short-circuit protection by limiting the
output current to about 500mA.
The LDO uses an independently trimmed 1V reference as its
input. An internal resistor divider drops the LDO output
voltage down to 1V. This is compared to the 1V reference for
regulation. The resistor division ratio is programmed in the
factory to one of the following output voltages: 3.3, 2.85V,
2.8V, and 2.5V.
7
ISL9007
Overheat Detection
The bandgap outputs a proportional-to-temperature current
that is indicative of the temperature of the silicon. This
current is compared with references to determine if the
device is in danger of damage due to overheating. When the
die temperature reaches about +145°C, the LDO
momentarily shuts down until the die cools sufficiently. In the
overheat condition, if the LDO sources more than 50mA it
will be shut off. Once the die temperature falls back below
about +110°C, the disabled LDO is re-enabled and soft-start
automatically takes place.
October 30, 2008
FN9218.2