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LTC1550LCMS8-2.5#TRPBF

P1-P3P4-P6P7-P9P10-P12
10
LTC1550L/LTC1551L
APPLICATIONS INFORMATION
WUU
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Figure 7. Output Ripple vs Input Bypass Capacitance
INPUT CAPACITANCE (µF)
0.1
OUTPUT RIPPLE (mV
P-P
)
8
7
6
5
4
3
2
1
0
1 10 100
1550L/51L F08
V
CC
= 5V
T
A
= 25°C
C
OUT
= 10µF
Output Ripple vs Input Bypass Capacitor
The input bypass capacitor (C
IN
) can also have a fairly
significant impact on the output ripple. C
IN
provides most
of the LTC1550L/LTC1551L’s supply current while it is
charging the flying capacitor (C1). Inadequate input
bypassing can cause the V
CC
supply to dip when the
charge pump switches, causing the output linear regulator
to momentarily stop regulating. C
IN
should be mounted as
close to the LTC1550L/LTC1551L V
CC
and GND pins as
possible and its value should be significantly larger than
C1. Surface mount tantalum or ceramic capacitors with
low ESR generally provide adequate performance. Figure␣ 7
shows the LTC1550L/LTC1551L peak-to-peak output ripple
vs C
IN
, taken using the test circuit in Figure 3 with I
LOAD
set
at 5mA. C
OUT
is a 10µF in parallel with a 0.1µF ceramic
capacitor.
A 2.2µF surface mount ceramic capacitor at V
CC
generally
provides adequate output ripple performance for most
applications.
1
2
4.5V ≤ V
CC
≤ 5.25V
8
7
REG
CP
OUT
SHDN
V
CC
C1
+
V
OUT
LTC1550L-4.1
–4.1V BIAS
GND
C1
–
C
OUT
10µF
1550L/51L TA02
C
CP
0.1µF
GaAs
TRANSMITTER
C1
0.1µF
C
IN
2.2µF
3
4
6
5
C
L
0.1µF
+
+
–4.1V Output GaAs FET Bias Generator
TYPICAL APPLICATION
U
11
LTC1550L/LTC1551L
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
U
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
GN Package
16-Lead Plastic SSOP (Narrow 0.150)
(LTC DWG # 05-08-1641)
GN16 (SSOP) 1098
* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
12
3
4
5
6
7
8
0.229 – 0.244
(5.817 – 6.198)
0.150 – 0.157**
(3.810 – 3.988)
16
15
14
13
0.189 – 0.196*
(4.801 – 4.978)
12 11 10
9
0.016 – 0.050
(0.406 – 1.270)
0.015
± 0.004
(0.38 ± 0.10)
× 45°
0° – 8° TYP
0.007 – 0.0098
(0.178 – 0.249)
0.053 – 0.068
(1.351 – 1.727)
0.008 – 0.012
(0.203 – 0.305)
0.004 – 0.0098
(0.102 – 0.249)
0.0250
(0.635)
BSC
0.009
(0.229)
REF
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
MSOP (MS8) 1098
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006"
(
0.152mm
)
PER SIDE
0.021
± 0.006
(0.53 ± 0.015)
0
° – 6° TYP
SEATING
PLANE
0.007
(0.18)
0.040
± 0.006
(1.02 ± 0.15)
0.012
(0.30)
REF
0.006 ± 0.004
(0.15 ± 0.102)
0.034 ± 0.004
(0.86 ± 0.102)
0.0256
(0.65)
BSC
12
3
4
0.193 ± 0.006
(4.90 ± 0.15)
8
7
6
5
0.118 ± 0.004*
(3.00 ± 0.102)
0.118 ± 0.004**
(3.00 ± 0.102)
12
LTC1550L/LTC1551L
15501lf LT/TP 0300 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1996
TYPICAL APPLICATION
U
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OUT
= 20mA (V
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IN
≥ 3V)
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= 13µA, I
OUT
= 50mA (V
IN
≥ 3V), I
OUT
= 25mA (V
IN
≥ 2.7V)
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
U
1
2
2.7V ≤ V
CC
≤ 5.25V
8
7
REG
CP
OUT
SHDN
V
CC
C1
+
V
OUT
LTC1550L-2
–2V
GND
C1
–
C
OUT
10µF
1550L/51L TA03
C
CP
0.1µF
GaAs
TRANSMITTER
C1
0.1µF
C
IN
2.2µF
3
4
6
5
C
L
0.1µF
+
+
10k
REG
1mV
P-P
Ripple, –2V Output GaAs FET Bias Generator
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)
× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1
2
3
4
0.150 – 0.157**
(3.810 – 3.988)
8
7
6
5
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
P1-P3P4-P6P7-P9P10-P12

LTC1550LCMS8-2.5#TRPBF

Mfr. #:
Buy LTC1550LCMS8-2.5#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators L N, Switched Cap Reg V Inv
Lifecycle:
New from this manufacturer.
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