LT3513 LINER [Linear Technology], LT3513 Datasheet - Page 9

• Manufacturer Part Number: LT3513
• Description: 2MHz High Current 5-Output Regulator for TFT-LCD Panels
• Manufacturer: LINER [Linear Technology]

PIN FUNCTIONS
SENSE
(along with the SENSE
current for the buck switching regulator.
FB1 (Pin 32): Feedback Pin. Tie the resistor divider tap
to this pin and set V
(1 + R1/R2). Reference designators refer to Figure 2.
SW1 (Pins 34, 35): Switch Node. The SW1 pins are the
emitter of the internal NPN bipolar power transistor for
switching regulator 1. These points must be tied together
for proper operation. Connect these pins to the inductor,
catch diode and boost capacitor.
V
to the internal circuitry of the LT3513. This pin must be
locally bypassed with a capacitor.
IN
(Pins 36, 37): Input Voltage. This pin supplies current
+
(Pin 31) Positive Current Sense Input. This pin
LOGIC
–
pin) is used to sense the inductor
according to V
LOGIC
= 1.23V •
UVLO (Pin 38): Undervoltage Lockout. A resistor divider
connected to V
input voltage at which the LT3513 will operate. This pin is
compared to the internal 1.25V reference. When UVLO is
less than 1.25V, the switching regulators are not allowed
to operate (the RUN/SS pins are still used to turn on each
switching regulator). When this pin falls below 1.25V,
3.9μA will be pulled from the pin to provide programmable
hysteresis for UVLO.
Exposed Pad (Pin 39): Ground. The Exposed Pad of the
package provides both electrical contact to ground and
good thermal contact to the printed circuit board. The
Exposed Pad must be soldered to the circuit board for
proper operation.
IN
is tied to this pin to program the minimum
LT3513
3513fa
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