Table of Contents
Advertisement
Quick Links
DESCRIPTION
Demo Circuit 3091A features the
6A/dual-phase 12A step-down DC/DC regulator IC. This
demo circuit is configured as a 2MHz, 3.3V input buck
regulator with dual 6A output at 1.2V and 1.8V.
The LTC3312SA features dual monolithic synchronous 6A
step-down power stages in a 3mm × 4mm package for
space saving applications with demanding performance
requirements. Both bucks achieve high efficiency and
fast transient response with small external components.
The LTC3312SA can also be configured as a single out-
put, dual-phase 12A step-down converter. Please refer
to DC3092A as a single output dual-phase application
example. The LTC3312SA data sheet gives a complete
description of its operation and application information.
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
V
/V
EMI
DC3091A Input Voltage Range
IN
IN
V
DC3091A Output 1 Voltage Range
OUT1
V
DC3091A Output 2 Voltage Range
OUT2
I
DC3091A Output Current (Each Output)
OUT
f
Switching Frequency
SW
EFF1
Output1 Efficiency
EFF2
Output2 Efficiency
3.3V to 1.2V and1.8V at 6A, 2MHz Dual
Step-Down DC/DC Regulators
LTC
3312SA, 5V, dual
®
Specifications are at T
CONDITIONS
V
= 3.3V, I
IN
V
= 3.3V, I
IN
DEMO MANUAL DC3091A
The data sheet must be read in conjunction with this demo
manual when evaluating or modifying this demo circuit.
DC3091A supports three operation modes, including
pulse skip, forced continuous and Burst Mode
The clock frequency and the operation mode are shared by
both regulators. User can select desired operation mode
with JP1 jumper. Setting JP1 to FC/SYNC position also
allows the LTC3312SA to sync to a clock frequency from
1MHz to 3MHz, operating in forced continuous mode.
An EMI filter is included in this demo circuit for noise
sensitive applications. To power with EMI filter, please
apply input voltage via VIN EMI terminal.
Design files for this circuit board are
All registered trademarks and trademarks are the property of their respective owners.
= 25°C
A
= 3A,V
= 1.2V
OUT
OUT1
= 3A,V
= 1.8V
OUT
OUT2
LTC3312SA
operation.
®
available.
MIN
TYP
MAX
2.25
5.5
1.174
1.2
1.226
1.755
1.8
1.843
6
1.8
2.2
92
94
UNITS
V
V
V
A
MHz
%
%
Rev. 0
1
Advertisement
Table of Contents
Related Manuals for Analog Devices Linear ADI Power DC3091
Summary of Contents for Analog Devices Linear ADI Power DC3091
- Page 1 DEMO MANUAL DC3091A LTC3312SA 3.3V to 1.2V and1.8V at 6A, 2MHz Dual Step-Down DC/DC Regulators DESCRIPTION Demo Circuit 3091A features the 3312SA, 5V, dual The data sheet must be read in conjunction with this demo ® 6A/dual-phase 12A step-down DC/DC regulator IC. This manual when evaluating or modifying this demo circuit.
-
Page 2: Board Photo
DEMO MANUAL DC3091A BOARD PHOTO Figure 1. DC3091A Demo Board QUICK START PROCEDURE Refer to Figure 2 for the proper measurement equipment Prepare for the Test setup and follow the procedure below: A. Select a power supply PS1 that can handle 5V of output NOTE: For accurate V and efficiency measure- voltage and 10A of output current, with internal current... - Page 3 DEMO MANUAL DC3091A QUICK START PROCEDURE Test BUCK1 (VOUT1) stable output. Refer to the LTC3312SA data sheet and LTPowerCAD for more information on choosing the 1. Connect PS1, LD1, VM1, VM2 and VM3 as shown in required components. Figure 2. If the input EMI filter is desired, connect the input power supply to VIN EMI and GND.
-
Page 4: Test Setup
DEMO MANUAL DC3091A TEST SETUP 3.3V Figure 2. Test Setup for DC3091A Demo Board Figure 3a. Technique for Measuring Output Ripple and Figure 3b. Technique for Measuring Output Ripple and Step Step Response Response with a Low Inductance Connector (Not Supplied) Rev. 0... -
Page 5: Typical Performance Characteristics
DEMO MANUAL DC3091A TYPICAL PERFORMANCE CHARACTERISTICS 220nH OUT1 2.25V TO 1.2V 5.5V 22µF 1µF 10nF 140k LTC3312SA 47µF ×2 100k 100k SSTT1 249k 0.015µF PGOOD1 330nH 22µF 1µF OUT2 1.8V 22nF 107k 47µF SSTT2 ×2 249k 0.015µF 41.2k 100k 1µF PGOOD2 MODE/SYNC AGND... - Page 6 DEMO MANUAL DC3091A TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Response, Forced Load Transient Response, Forced Continuous Mode Continuous Mode LOAD LOAD 2.5A/DIV 2.5A/DIV 2A/DIV 2A/DIV 50mV/DIV 50mV/DIV dc3091a F07 dc3091a F08 10µs/DIV 10µs/DIV 3.3V TO 1.2V , 2MHz 3.3V TO 1.8V , 2MHz LOAD STEP: 0.1A TO 4.5A IN 1µs LOAD STEP: 0.1A TO 4.5A IN 1µs...
-
Page 7: Theory Of Operation
DEMO MANUAL DC3091A THEORY OF OPERATION Introduction to the DC3091A The PWM modes of operation are Burst, Pulse Skip and Forced Continuous. See the LTC3312SA data sheet for The DC3091A demonstration circuit features the more detailed information. LTC3312SA, 5V, Dual 6A/Dual-Phase 12A step-down DC/ DC regulator. -
Page 8: Parts List
NIC, NRC04F1073TRF RES., 41.2k, 1%, 1/16W, 0402 VISHAY, CRCW040241K2FKED IC, 5V, DUAL 6A/DUAL PHASE 12A STEP-DOWN ANALOG DEVICES, LTC3312SAAV#PBF DC/DC REGULATOR, LQFN Additional Demo Board Circuit Components C7, C8 CAP ., 470µF, TANT, POSCAP , 6.3V, 20%, 7343, 18mΩ PANASONIC, 6TPE470MI CAP ., 0.1µF, X7R, 25V, 10%, 0402... -
Page 9: Schematic Diagram
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. - Page 10 Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY.
Need help?
Do you have a question about the Linear ADI Power DC3091 and is the answer not in the manual?
Questions and answers