LT1933ES6#PBF Linear Technology, LT1933ES6#PBF Datasheet - Page 6

• Manufacturer Part Number: LT1933ES6#PBF
• Description: IC, STEP-DOWN REGULATOR, 6-TSOT-23
• Manufacturer: Linear Technology

Specifications of LT1933ES6#PBF

• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Output Current: 600mA
• No. Of Pins: 6
• Operating Temperature Range: -40°C To +85°C
• Supply Voltage Range: 3.6V To 36V
• Switching Frequency Max: 600kHz
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN FUNCTIONS
LT1933
BOOST (Pin 1): The BOOST pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch.
GND (Pin 2/Pin 5 and Exposed Pad, Pin 7): Tie the
GND pin to a local ground plane below the LT1933 and
the circuit components. Return the feedback divider to
this pin.
FB (Pin 3/Pin 6): The LT1933 regulates its feedback pin to
1.245V. Connect the feedback resistor divider tap to this
pin. Set the output voltage according to V
(1 + R1/R2). A good value for R2 is 10k.
BLOCK DIAGRAM
6
ON OFF
V
IN
R3
C2
C4
V
SHDN
IN
INT REG
UVLO
AND
OSC
(SOT-23/DFN)
SLOPE
FREQUENCY
FOLDBACK
COMP
Σ
V
GND
C
OUT
= 1.245V
g
m
R
S
Q
Q
1.245V
SHDN (Pin 4): The SHDN pin is used to put the LT1933 in
shutdown mode. Tie to ground to shut down the LT1933.
Tie to 2.3V or more for normal operation. If the shutdown
feature is not used, tie this pin to the V
provides a soft-start function; see the Applications Infor-
mation section.
V
LT1933’s internal regulator and to the internal power
switch. This pin must be locally bypassed.
SW (Pin 6): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
R2
IN
(Pin 5/Pin 2): The V
FB
R1
DRIVER
Q1
IN
BOOST
pin supplies current to the
SW
C3
D1
IN
L1
D2
pin. SHDN also
1933 BD
C1
V
OUT
1933fe