ISL9016IRUNCZ-T Intersil, ISL9016IRUNCZ-T Datasheet - Page 9

• Manufacturer Part Number: ISL9016IRUNCZ-T
• Description: IC REG LDO LN 3.3/1.8V 6-UTDFN
• Manufacturer: Intersil
• Series: -r

Specifications of ISL9016IRUNCZ-T

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V, 1.8V
• Voltage - Input: 1.8 ~ 6.5 V
• Voltage - Dropout (typical): 0.12V @ 150mA, 0.25V @ 150mA
• Number Of Regulators: 2
• Current - Output: 150mA (Max)
• Current - Limit (min): 175mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-µTDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block Diagram
Functional Description
ISL9016 contains two high performance LDO’s. High
performance is achieved through a circuit which delivers fast
transient response to varying load conditions. In a quiescent
condition, the ISL9016 adjusts its biasing to achieve the
lowest standby current consumption.
The device also integrates current limit protection, thermal
shutdown protection, reverse current protection and soft-start.
Thermal shutdown protects the device against overheating.
Soft-start limits the start-up input current surges. In some
certain application circuits, the output voltage may be
externally held up, meanwhile, the input voltage could be
connected to ground, or connected to some voltage lower
than the output side, or be left open circuit. ISL9016 features
the reverse current protection; it can limit the current flow from
output to input. This protection will automatically initiate when
V
ground and V
to V
Enable Control
The ISL9016 has two separate enable pins, EN1 and EN2,
which independently enable/disable each of the LDO
outputs. When both EN1 and EN2 are low, the whole device
is in shutdown mode. In this condition, all on-chip circuits are
off, and the device draws minimum current, typically less
than 0.1mA. When one or both the EN pins go high, the
OUT
IN
is detected to be higher than V
is typically less than 8µA.
EN1
EN2
VIN
OUT
LDO-2
is held at 5.5V, the current flow from V
EN1
VIN
LDO-1
TEMP-SENSOR
BANDGAP
UNDERVOLTAGE
9
LOCKOUT
IN
. When V
VREF1
IN
REFERENCE
VOLTAGES
is pulled to
VREF2
CONTROL
LOGIC
OUT
VREF3
ISL9016
VREF1
LDO1 and/or LDO2 will be enabled accordingly based on the
voltage signal applied on its related EN pin and start from the
soft-start. Likewise, when one or both EN pins go low, LDO1
and/or LDO2 will be disabled based on the signal applied on
its related EN pin. A 100kΩ (or above) pull-up resistor should
be connected between ENx pin and the external control
voltage (as shown in the “Typical Application Diagram” on
page 8).
LDO Protections
ISL9016 offers several protections which make it ideal for
using in battery-powered application circuits.
ISL9016 provides short-circuit protection by limiting the
output current to typical 265mA. When short circuit happens,
the circuit is limited at 265mA (typical). If the short circuit
lasts long enough, the die temperature increases, and the
over-temperature protection circuit will turn off the output.
When the die temperature reaches about +145°C, the thermal
protection starts working. Under the overheat condition, only
the LDO sourcing more than 50mA will be shut off. This does
not affect the operation of the other LDO. If both LDOs source
more than 50mA and an overheat condition occurs, both LDO
outputs will be disabled. Once the die temperature falls back
to about +110°C, the disabled LDO(s) are re-enabled and
soft-start automatically takes place.
In certain applications, the following input/output situations
may occur:
THERMAL PROTECTION
SHORT CIRCUIT
+
SOFT-START
VOUT2
REVERSE CURRENT
PROTECTION
GND
VOUT1
VOUT1
January 22, 2009
FN6832.0