LTC1772BES6#TRPBF Linear Technology, LTC1772BES6#TRPBF Datasheet - Page 5

• Manufacturer Part Number: LTC1772BES6#TRPBF
• Description: IC CTRLR DC/DC S-DWN SOT23-6
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1772BES6#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 9.8 V
• Current - Output: 1A
• Frequency - Switching: 550kHz
• Voltage - Input: 2.5 ~ 9.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

PIN FUNCTIONS
I
serves as the error amplifi er compensation point as well
as the run control input. Nominal voltage range for this
pin is 0.85V to 1.9V. Forcing this pin below 0.35V causes
the device to be shut down. In shutdown all functions are
disabled and the PGATE pin is held high.
GND (Pin 2): Ground Pin.
V
resistive divider across the output.
FUNCTIONAL DIAGRAM
TH
FB
/RUN (Pin 1): This pin performs two functions. It
(Pin 3): Receives the feedback voltage from an external
GND
V
5
2
IN
SENSE
4
4
–
FOLDBACK
15mV
FREQ
OSC
+
SHORT-CIRCUIT
–
–
+
DETECT
ICMP
0.5μA
UNDERVOLTAGE
SLOPE
COMP
REFERENCE
VOLTAGE
LOCKOUT
V
+
–
IN
0.3V
V
0.8V
REF
0.35V
SENSE
parator.
V
GND Pin 2.
PGATE (Pin 6): Gate Drive for the External P-channel
MOSFET. This pin swings from 0V to V
IN
1
I
(Pin 5): Supply Pin. Must be closely decoupled to
RS1
R
S
TH
/RUN
+
–
Q
–
SHDN
CMP
(Pin 4): The Negative Input to the Current Com-
SWITCHING
LOGIC AND
BLANKING
CIRCUIT
SHDN
UV
EAMP
OVP
+
–
+
–
1.2V
V
LTC1772B
IN
V
+
60mV
V
0.8V
REF
REF
IN
.
V
IN
1772FD
PGATE
V
6
3
FB
1772bfa
5