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LDR3325PT-R Datasheet

  • LDR3325PT-R

  • VERY LOW DROP DUAL VOLTAGE REGULATOR

  • 389.26KB

  • 13頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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LDRxxyy
VERY LOW DROP
DUAL VOLTAGE REGULATOR
s
s
s
s
s
s
s
s
s
s
s
OUTPUT CURRENT 1 UP TO 500mA
OUTPUT CURRENT 2 UP TO 1.0A
LOW DROPOUT VOLTAGE 1
(0.3V @ I
O
=500mA)
LOW DROPOUT VOLTAGE 2
(0.4V @ I
O
=1A)
VERY LOW SUPPLY CURRENT (TYP.50碌A(chǔ)
IN OFF MODE, 1.6mA MAX IN ON MODE)
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
OUTPUT VOLTAGE AVAILABILITY FOR
EACH REGULATOR: 1.8V, 2.5V, 3.3V
INTERNAL CURRENT AND THERMAL LIMIT
STABLE WITH LOW VALUE (MIN 4.7碌F)
AND LOW E.S.R. OUTPUT CAPACITORS
SUPPLY VOLTAGE REJECTION: 70dB (TYP.)
TEMPERATURE RANGE (-40擄C TO 125擄C)
SPAK-7L
PPAK
DESCRIPTION
The LDRxxyy is a Very Low Drop Dual Voltage
Regulator available in PPAK for the version
without inhibit and in SPAK-7L for the version with
the shutdown feature. The very low drop-voltage
Figure 1: Block Diagram
V
I1
POWER 1
(0.5V) and the very low supply current make it
particularly suitable for low noise and low power
applications such as PDA, MICRODRIVE and
other data storage applications while the used
high voltage technology makes this device
suitable for consumer applications such as
MONITORS AND SET-TOP-BOX. For each V
O
a
Shutdown Logic Control function is available (TTL
compatible) to decrease the total power
consumption.
V
O1
I
NH1
START UP 1
BAND GAP 1
DRIVER 1
+
-
ERROR
AMPLIFIER 1
THERMAL 1
THERMAL 2
+
-
ERROR
AMPLIFIER 2
I
NH2
START UP 2
BAND GAP 2
DRIVER 2
V
I2
POWER 2
V
O2
August 2004
Rev. 2
1/13

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