LT3045 datasheet(41/45 Pages) AD

41 / 45 page

Data Sheet

LT83201

analog.com

Rev. A 41 of 45

Figure 67. Dynamic Output Voltage Control 5V to 8V 1A 1.6MHz Step-Down Converter with External DAC

VOUT = (VREF + 1) × 0.866

5V TO 8V

PIN(S) NOT USED IN THIS CIRCUIT:

PG, SYNC/MODE

61.9kΩ

1µF

64.9kΩ

1.5kΩ

0.1µF

1µF

4.7nF

1µF

10kΩ

3.3µH

VIN

EN/UVLO

GND

INTVCC

OUTS

LT83201

fSW = 1.6MHz

BST

SET

VIN

GND

VIN

12V

0603

X7T

35V

CSET: GCM188D7YA105KE36#

PGFB

DAC OUTPUT* (VREF):

4.77V TO 8.24V

0V TO 10V OUTPUT RANGE

INTERNAL REFERENCE MODE

L: DFE322512

LTC2688

0.5V OR INTVCC**

4.7µF

2.2µF ×2

22µF ×2

47µF ×1

*NOTE: DAC OUTPUT SHOULD BE ABLE TO SOURCE AND SINK 1mA CURRENT.

**NOTE: APPLICATIONS WITH DYNAMIC VOLTAGE CONTROL WILL NOT BE ABLE TO USE THE POWER GOOD AND FAST

START-UP FUNCTIONALITIES AND MUST TIE PGFB TO 0.5V or INTVCC TO DISABLE THESE FUNCTIONS CORRECTLY.

NOTE: CONTACT FACTORY FOR LT83201-2 WHICH DISABLES THE 100µA SET PIN CURRENT FOR IMPROVED DYNAMIC

VOLTAGE CONTROL ACCURACY AND QUIESCENT CURRENT.

LT3045 Datasheet(PDF) 41 Page - Analog Devices

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