OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

CRCW04021K02FKTD

P1-P3P4-P6P7-P8
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright 2000
Rev. 0.3D, 2002-01-08
WWW.Microsemi .COM
LX8817
Dual Channel 2.5A Low Dropout Regulato
r
P
RODUCTION
D
ATA
S
HEET
LINFINITY DIVISION
DESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
The LX8817 is a dual channel
positive-voltage linear regulator. This
dual regulator has one fixed output
coupled with an adjustable output.
Each channel features low-dropout
and high accuracy.
The LX8817 utilizes dual inputs that
can be used as separate sources for the
control and power sections. This
configuration reduces power dis-
sipation by operating the regulator
near dropout (V
PWR
-V
OUT
= V
DO
=
0.6V @ 2.5A) while providing
sufficient operating headroom for the
control logic.
The LX8817 provides designers
with an efficient flexible power
management solution, minimal printed
circuit board area, and shorter design
cycles.
Each channel can supply up to 2.5A
independently with a regulator design
optimized for system efficiency by
consuming minimal ground current
and directing quiescent current to the load.
The LX8817 features on-chip
trimming of the internal voltage refer-
ence, enabling precise output voltages,
typically ±1% of it’s specified value.
Power sequencing logic ensures proper
startup regardless of the level of V
CTRL
or V
PWR
. The LX8817 outputs remain
off while V
PWR
< 2.4V.
Thermal and Short Circuit Current
Protection are integrated on-chip and
operate independently for each regulator
output.
The LX8817 regulator is stable with a
low-value output capacitor, typically
10µF tantalum or ceramic on the
outputs, allowing designers flexibility in
external component selection.
Linfinity’s S-PAK power package
offers maximum power dissipation and
ease of assembly using surface mount
technology.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
KEY FEATURES KEY FEATURES
KEY FEATURES
! Two Independent Regulated
Outputs
! Accurate Output Voltages
! Max. Dropout of 0.6V at Rated
Current
! Independent Thermal and
Current Limit Protection
! Low Profile 7 Lead SMT Power
Package
! Low Tolerance Line (0.2%) and
Load (0.4%) Regulation
! Wide DC Supply Voltage of 3.0V
to 10.0V
! Loop Stability Independent of
Output Capacitor Type
APPLICATIONS/BENEFIT
APPLICATIONS/BENEFITAPPLICATIONS/BENEFIT
APPLICATIONS/BENEFITS
SS
S
! 3.3V to 2.5V/ADJ Linear
Regulator
! Low Voltage Logic Supplies
! Active SCSI Terminators
! Battery Charging Circuits
! Instrumentation
! PC Peripherals
PRODUCT HIGHLIGHT
PRODUCT HIGHLIGHTPRODUCT HIGHLIGHT
PRODUCT HIGHLIGHT
2
5
6
4
1
3
LX8817
V
PWR
V
1
V
2
V
CTRL
V
CTRL
V
PWR
V
OUT1
V
OUT2
ADJ
V2
GND
PACKAGE ORDER INFO
T
A
(°C)
O
UTPUT V
1
OUTPUT V
2
DF
Plastic S-PAK
7-PIN
0 to 125 2.5V Adj LX8817-25CDF
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8817-25CDFT)
L
L
X
X
8
8
8
8
1
1
7
7
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright 2000
Rev. 0.3D, 2002-01-08
WWW.Microsemi .COM
LX8817
Dual Channel 2.5A Low Dropout Regulato
r
P
RODUCTION
D
ATA
S
HEET
LINFINITY DIVISION
ABSOLUTE MAXIMUM RAT
ABSOLUTE MAXIMUM RATABSOLUTE MAXIMUM RAT
ABSOLUTE MAXIMUM RATINGS
INGSINGS
INGS
Input Voltage (V
CTRL
, V
PWR
) ........................................................................ 13.5V
Load Current (Internally Limited).................................................................. 3.0A
Power Dissipation...................................................................... Internally Limited
Short-Circuit Protection...........................................................................Indefinite
Operating Junction Temperature ..................................................................150°C
Storage Temperature Range .......................................................... -65°C to 150°C
Lead Temperature (Soldering 180 seconds) .................................................235°C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal
.
PACKAGE PIN OUT
PACKAGE PIN OUTPACKAGE PIN OUT
PACKAGE PIN OUT
DF PACKAGE
(Top View)
1
V
CTRL
V
OUT1
V
PWR
GND
V
OUT2
2
3
4
5
TAB is GND
ADJ
V2
6
NC
7
THERMAL DATA
THERMAL DATATHERMAL DATA
THERMAL DATA
DF Plastic S-PAK 7-PIN
THERMAL RESISTANCE-JUNCTION TO TAB, θ
θθ
θ
JT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ
θθ
θ
JA
4.5°
°°
°C/W
30°
°°
°C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x θ
JA
).
The θ
JA
numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow. θ
JA
can vary significantly depending
on mounting technique. (See Application Notes Section: Thermal considerations)
FUNCTIONAL PIN DESCR
FUNCTIONAL PIN DESCRFUNCTIONAL PIN DESCR
FUNCTIONAL PIN DESCRIPTION
IPTIONIPTION
IPTION
PIN NAME DESCRIPTION
1 V
CTRL
Unregulated input voltage supply, provides bias for control circuitry, (V
CTRL
– V
OUT
) > 1V.
2 V
OUT1
Regulator #1 fixed output voltage.
3 V
PWR
Unregulated input voltage supply for power section. For proper operation: (V
PWR
– V
OUT
) >
V
DROPOUT
.
4 GND
Common terminal for ground reference, Tab of package is internally connected to this pin.
5 V
OUT2
Regulator #2 adjustable output.
6 ADJ
V2
Regulator #2 voltage feedback. Sets the output voltage for regulator #2 via an external resistor
divider.
7 NC
Not used.
P
P
A
A
C
C
K
K
A
A
G
G
E
E
D
D
A
A
T
T
A
A
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page
3
Copyright 2000
Rev. 0.3D, 2002-01-08
WWW.Microsemi .COM
LX8817
Dual Channel 2.5A Low Dropout Regulato
r
P
RODUCTION
D
ATA
S
HEET
LINFINITY DIVISION
RECOMMENDED MAX OPER
RECOMMENDED MAX OPERRECOMMENDED MAX OPER
RECOMMENDED MAX OPERATING CONDITIO
ATING CONDITIOATING CONDITIO
ATING CONDITION
NN
N
LX8817-25
Parameter Symbol
Min Typ Max
Units
V
CTRL
10 V
Input Voltage
V
PWR
7.5 V
Load Current (Internally Limited) I
1,
I
2
3.0 A
Operating Junction Temperature T
J
125
°C
ELECTRICAL CHARACTER
ELECTRICAL CHARACTERELECTRICAL CHARACTER
ELECTRICAL CHARACTERISTICS
ISTICSISTICS
ISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ T
A
≤ 125°C except where
otherwise noted and the following test conditions: V
CTRL
= 5V, V
PWR
= 3.3V I
OUT
= 5mA, C
1, 2, 3, 4
= 10µF (Tantalum), and T
J
= T
A
using
low duty cycling methods.
LX8817-25
Parameter Symbol Test Conditions
Min Typ Max
Units
!
FIXED OUTPUT
Output Voltage
• LX8817-2500
V
1
5mA < I
1
< 2.5A, 3.75V < V
CTRL
< 10V
3.3V < V
PWR
< 5.5V
2.438 2.500 2.538 V
Line Regulation
∆V
1
(V
IN
)
3.3V<V
CTRL
<10V, 3.3V<V
PWR
<5.5V, I
1
= 5mA 1 5 mV
Load Regulation
∆V
1
(I
1
)
5mA < I
1
< 2.5A, V
CTRL
=5V, V
PWR
=3.3V 1 5 mV
Dropout Voltage (PWR) V
PWR
-V
1
I
1
= 2.5A, ∆V
1
= -2%
I
1
= 2.0A, ∆V
1
= -2%
I
1
= 1.0A, ∆V
1
= -2%
0.500
0.375
0.225
0.730
0.580
0.390
V
Current Limit I
1 (MAX)
2.55 3.0 A
Minimum Load Current I
1
Note 1 0 5 mA
!
ADJUSTABLE OUTPUT
Reference Voltage V
2
5mA < I
2
< 2.5A, 3.75V < V
CTRL
< 10V
3.3V < V
PWR
< 5.5V
1.231 1.250 1.288 V
Line Regulation
∆V
2
(V
IN
)
3.3V<V
CTRL
<10V, 3.3V<V
PWR
<5.5V, I
2
= 5mA 0.05 3 mV
Load Regulation
∆V
2
(I
2
)
5mA < I
2
< 2.5A, V
CTRL
=5V, V
PWR
=3.3V 10 19 mV
Dropout Voltage V
PWR
-V
2
I
2
= 2.5A, ∆V
2
= -2%
I
2
= 2.0A, ∆V
2
= -2%
I
2
= 1.0A, ∆V
2
= -2%
0.500
0.375
0.225
0.730
0.580
0.390
V
Current Limit I
2 (MAX)
2.55 3.0 A
Minimum Load Current I
2
Note 1 1 5 mA
Adjust Pin Bias Current I
ADJ
1 2
µA
!
ENTIRE REGULATOR
V
PWR
2.6 V
Minimum Operating Voltage
V
CONTROL
3.3 V
Under Voltage Lockout V
PWR
Rising, 3.0V<V
CTRL
< 10V, Both Outputs Off 2.2 V
I
1
=I
2
=5mA 3 5 mA
Quiescent Current I
Q
I
1
=I
2
=2.5A 6 10 mA
Ripple Rejection PSRR
f=120Hz, T
J
= 25°C
60 75 dB
RMS Output Noise
10Hz < f < 10kHz 0.003 %V
OUT
Thermal Shutdown T
JSD
160
°C
Note 1: Minimum load current is defined as the amount of output current required to maintain regulation. Typically this current provides the bias to the external resistor divider
network used to set the output voltage.
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
P1-P3P4-P6P7-P8

CRCW04021K02FKTD

Mfr. #:
Buy CRCW04021K02FKTD
Manufacturer:
Vishay / Dale
Description:
Thick Film Resistors - SMD 1/16watt 1.02Kohms 1%
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet