LTC1550LCMS8-2 Linear Technology, LTC1550LCMS8-2 Datasheet - Page 7

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

Specifications of LTC1550LCMS8-2

• 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: Contains lead / RoHS non-compliant
• Power - Output: -

OVERVIEW
The LTC1550L/LTC1551L are switched capacitor, inverting
charge pumps with internal linear post-regulators. The
LTC1550L/LTC1551L provide a regulated, low ripple output
at up to 20mA load current with the appropriate input
voltage as output load current depends on the input/
output voltage combination. Consult the graph provided in
the Typical Performance Characteristics section and the
Electrical Characteristics table for guaranteed test points.
The LTC1550L/LTC1551L are ideal for use as bias voltage
BLOCK
APPLICATIONS
*SHDN
DIAGRAM
** FIXED OUTPUT VERSIONS ONLY
*SHDN FOR LTC1550L, SHDN FOR LTC1551L
U
900kHz
CLK
INFORMATION
U
W
W
S2
V
CC
S1
S3
C1
C1
C1
+
–
CHARGE
PUMP
U
S4
CP
C
1.225V
CP
OUT
LINEAR
REGULATOR
1.167V
58mV
generators for GaAs transmitter FETs in portable RF and
cellular telephone applications. The LTC1550L features an
active-low Shutdown pin (SHDN) that drops quiescent
current to below 1 A. The LTC1551L is identical to the
LTC1550L, except that the Shutdown pin is active-high
(SHDN). 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.
+
–
+
–
COMP2
**
**
LTC1550L/LTC1551L
V
ADJ
REG
OUT
1550L/51L BD
+
C
OUT
7