LTC1550LCMS8-2#TRPBF Linear Technology, LTC1550LCMS8-2#TRPBF Datasheet

IC VOLT INV REGLTD SW-CAP 8-MSOP

LTC1550LCMS8-2#TRPBF

Manufacturer Part Number
LTC1550LCMS8-2#TRPBF
Description
IC VOLT INV REGLTD SW-CAP 8-MSOP
Manufacturer
Linear Technology
Type
Switched Capacitor (Charge Pump), Invertingr
Datasheet

Specifications of LTC1550LCMS8-2#TRPBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
-2V
Current - Output
20mA
Frequency - Switching
900kHz
Voltage - Input
2.7 ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1550LCMS8-2#TRPBFLTC1550LCMS8-2
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC1550LCMS8-2#TRPBFLTC1550LCMS8-2.5
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC1550LCMS8-2#TRPBFLTC1550LCMS8-2.5
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
Regulated Negative Voltage from a Single
Positive Supply
Low Output Ripple: Less Than 1mV
High Charge Pump Frequency: 900kHz
Small Charge Pump Capacitors: 0.1 F
Requires Only Four External Capacitors
Fixed – 4.1V, –2.5V, –2V or Adjustable Output
Shutdown Mode Drops Supply Current to <1 A
High Output Current: Up to 20mA (Depending on
V
Output Regulation: 2.5% Over Line, Load and
Temperature
Available in 8-Lead MSOP, 8-Lead Narrow SO and
16-Lead Narrow SSOP
GaAs FET Bias Generators
Negative Supply Generators
Battery-Powered Systems
Single Supply Applications
CC
+
3.6V
to V
2.2 F
C
IN
Figure 1. – 2V Generator with 1mV
OUT
1
2
3
4
SHDN
V
C1
V
Range)
CC
OUT
LTC1550L-2
+
0.1 F
C1
U
CP
GND
REG
OUT
C1
6
5
8
7
R1
10k
+
POWER VALID
C
10 F
U
OUT
P-P
P-P
Noise
C
0.1 F
C
0.1 F
Typ
L
CP
V
I
LOAD
OUT
1550L/51L TA01
= –2V
= 5mA
DESCRIPTIO
The LTC
pump voltage inverters which include internal linear post-
regulators to minimize output ripple. The LTC1550L fixed
output voltage versions include –4.1V, –2.5V and –2V with
ripple voltages typically below 1mV
also available in an adjustable output voltage version. The
LTC1550L/LTC1551L are ideal for use as bias voltage
generators for GaAs transmitter FETs in portable RF and
cellular telephone applications.
The LTC1550L/LTC1551L operate from single 2.7V to
5.5V supplies and draw typical quiescent currents of
3.5mA with a 5V supply. Each device includes a TTL
compatible Shutdown pin which drops supply current to
0.2 A typically. The LTC1550L Shutdown pin is active low
(SHDN), while the LTC1551L Shutdown pin is active high
(SHDN). Only four external components are required: an
input bypass capacitor, two 0.1 F charge pump capacitors
and a filter capacitor at the linear regulator output. The
adjustable LTC1550L/LTC1551L require two additional re-
sistors to set the output voltage. The LTC1550L/LTC1551L
will supply up to 20mA (depending on V
while maintaining guaranteed output regulation of 2.5%.
Both fixed voltage and adjustable LTC1550L/LTC1551L
are available in 8-lead MSOP and SO plastic packages: the
adjustable LTC1550L is also available in a 16-pin SSOP
with the REG pin.
AC COUPLED
2mV/DIV
®
1550L/LTC1551L are switched capacitor charge
V
Capacitor Regulated
OUT
Low Noise, Switched
V
OUT
U
Voltage Inverters
LTC1550L/LTC1551L
Output Noise and Ripple
5 s/DIV
P-P
. The LTC1550L is
CC
to V
1550L/51L TA01a
OUT
range),
1

Related parts for LTC1550LCMS8-2#TRPBF

LTC1550LCMS8-2#TRPBF Summary of contents

Page 1

... Output Regulation: 2.5% Over Line, Load and Temperature Available in 8-Lead MSOP, 8-Lead Narrow SO and 16-Lead Narrow SSOP U APPLICATIO S GaAs FET Bias Generators Negative Supply Generators Battery-Powered Systems Single Supply Applications , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO R1 10k 1 8 3.6V SHDN REG ...

Page 2

... T = 150 C, = 200 C/W JMAX JA ORDER PART NUMBER LTC1550LCMS8 LTC1551LCMS8 LTC1550LCMS8-2 LTC1551LCMS8-4.1 LTC1550LCMS8-2.5 LTC1550LCMS8-4.1 MS8 PART MARKING LTEG LTFQ LTGR LTFT LTFV LTEH Consult factory for Military grade parts and additional voltage options. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are 2.7V to 5.25V 0 SYMBOL PARAMETER f Internal Oscillator Frequency OSC ...

Page 4

LTC1550L/LTC1551L W U TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency vs Temperature 975 –4.1V OUT 925 875 825 775 725 675 –55 –35 – 105 125 TEMPERATURE (˚C) 1550L/51L G01 Maximum ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Output Spectrum (*See Figure –10 100k 1M 10M FREQUENCY (Hz) 1550L/51L G10 Spot Noise (See Figure 0 ...

Page 6

LTC1550L/LTC1551L PIN FUNCTIONS SHDN: Shutdown (TTL Compatible). This pin is active low (SHDN) for the LTC1550L and active high (SHDN) for the LTC1551L. When this pin the LTC1550L operates normally. When SHDN is ...

Page 7

... All members of the LTC1550L/LTC1551L family feature a 900kHz charge pump frequency. The LTC1550L/ LTC1551L come standard with fixed – 4.1V, –2.5V, –2V and adjustable output voltages. The LTC1550L/LTC1551L can be configured for other fixed output voltages; contact Linear Technology for more information. LTC1550L/LTC1551L + C OUT ...

Page 8

LTC1550L/LTC1551L U U APPLICATIONS INFORMATION The LTC1550L/LTC1551L consist of two major blocks (see Block Diagram): an inverting charge pump and a negative linear regulator. The charge pump uses two external capacitors, C1 and C to generate a negative CP voltage ...

Page 9

U U APPLICATIONS INFORMATION Figure 4 shows a marked decrease in peak-to-peak output ripple when a 0.1 F ceramic capacitor is added in parallel with the tantalum output capacitor. The additional ripple with the tantalum output capacitor alone is mostly ...

Page 10

LTC1550L/LTC1551L U U APPLICATIONS INFORMATION Output Ripple vs Input Bypass Capacitor The input bypass capacitor (C ) can also have a fairly IN significant impact on the output ripple the LTC1550L/LTC1551L’s supply current while it is charging the ...

Page 11

... INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE 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. ...

Page 12

... Adjustable or Fixed 50mA OUT OUT = 20mA (V 2V 50mA (V 3V) IN OUT IN = 10mA (V 2.7V 20mA (V 3V) IN OUT IN Ripple P 50mA (V 3V 25mA (V OUT IN OUT 15501lf LT/TP 0300 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1996 SO8 1298 , MSOP OUT 2.7V) IN ...

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