DC1105A datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Development board/suite/development tools> DC1105A

DC1105A: Descriptionboard eval for ltc3822edd; CategoryDevelopment board/suite/development tools; File Size226KB，4 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

Download Datasheet Compare View All

DC1105A Online Shopping

Suppliers	Part Number	Price	MOQ	In stock
	DC1105A	-	-	View	Buy Now

DC1105A Overview

board eval for ltc3822edd

Preview

Download Datasheet

View All

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1105

LOW VIN SYNCHRONOUS STEP-DOWN CONVERTER WITH TRACKING

LTC3822EDD-1

DESCRIPTION

Demonstration circuit 1105A is a high efficiency syn-

chronous step-down DC/DC converter with output

tracking featuring the LTC3822EDD-1 controller. The

demo board is capable of providing 1.8V/8A from 2.75V

to 4.5V input. Burst mode/Pulse skipping/Forced

continuous operation is selectable. The constant

frequency current mode architecture with MOSFET V

sensing eliminates the need for a sense resistor and

improves efficiency. The maximum peak current sense

threshold can easily be selected with the IPRG pin.

Switching frequency is internally set at 550KHz. The

frequency can be adjusted using PLLLPF pin. Tying

PLLLPF pin to GND selects 300KHz operation; tying

PLLLPF pin to V

selects 750KHz operation. The switch-

ing frequency can also be externally synchronized from

250KHz to 750KHz using SYNC terminal (JP1 should be

selected for Sync).

The demo board has a tracking feature, allowing Vout to

track an external voltage signal at TRACK terminal (JP2

selected for Track).

Design files for this circuit board are available. Call

the LTC factory.

LTC and LT are registered trademarks of Linear Technology Corporation.

Table 1. Performance Summary (T

= 25°C)

PARAMETER

Input Voltage Range

OUT

Maximum load current I

OUT

Typical Output Ripple Voltage

Typical Switching Frequency

= 2.75-4.5V, I

OUT

= 0A to 8A

= 2.75-4.5V, V

OUT

= 1.8V

= 3.3V, I

OUT

= 4A, Fs = 550KHz (20MHz BW)

PLLLPF Pin Floating

CONDITION

VALUE

2.75V to 4.5V

1.8V ±2%

12mV

P–P

550kHz

QUICK START PROCEDURE

Demonstration circuit 1105A is easy to set up to evalu-

ate the performance of the LTC3822-1. Refer to Figure 1

for proper measurement equipment setup and follow the

procedure below: (Initial jumper positions: JP1: PS;

JP2: Soft Start)

measuring the input or output voltage rip-

ple, care must be taken to avoid a long ground lead on

the oscilloscope probe. Measure the input or output

voltage ripple by touching the probe tip directly across

the Vin or Vout and GND terminals. See Figure 2 for

proper scope probe technique.

NOTE:

When

With power off, connect the input power supply to

+Vin (2.75V-4.5V) and GND (input return).

Connect the 1.8V load between Vout and GND (Initial

load: 0 A).

Connect DVMs to the input and output.

Turn on the input power supply and check for the

proper output voltage. Vout should be 1.8V+/-2%.

Once the proper output voltage is established, adjust

the load within the operating range and observe the

DC1105A Related Products

	DC1105A	LTC3822EDD-1#TRPBF	LTC3822EGN-1#TRPBF	LTC3822EDD-1#PBF	LTC3822EGN-1#PBF
Description	board eval for ltc3822edd	IC REG CTRLR BUCK 12DFN	IC REG CTRLR BUCK 16SSOP	IC REG CTRLR BUCK 12DFN	IC REG CTRLR BUCK 16SSOP
Brand Name	-	Linear Technology	-	Linear Technology	Linear Technology
Is it Rohs certified?	-	conform to	-	conform to	conform to
Maker	-	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )
Parts packaging code	-	DFN	-	DFN	SSOP
package instruction	-	HVSON, SOLCC12,.12,20	-	HVSON, SOLCC12,.12,20	SSOP, SSOP16,.3
Contacts	-	12	-	12	16
Manufacturer packaging code	-	DD	-	DD	GN
Reach Compliance Code	-	compliant	-	compliant	compliant
ECCN code	-	EAR99	-	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING CONTROLLER	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	-	CURRENT-MODE	-	CURRENT-MODE	CURRENT-MODE
Control Technology	-	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	-	4.5 V	-	4.5 V	4.5 V
Minimum input voltage	-	2.75 V	-	2.75 V	2.75 V
Nominal input voltage	-	3.3 V	-	3.3 V	3.3 V
JESD-30 code	-	S-PDSO-N12	-	S-PDSO-N12	R-PDSO-G16
JESD-609 code	-	e3	-	e3	e3
length	-	3 mm	-	3 mm	4.8895 mm
Humidity sensitivity level	-	1	-	1	1
Number of functions	-	1	-	1	1
Number of terminals	-	12	-	12	16
Maximum operating temperature	-	85 °C	-	85 °C	85 °C
Package body material	-	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	HVSON	-	HVSON	SSOP
Encapsulate equivalent code	-	SOLCC12,.12,20	-	SOLCC12,.12,20	SSOP16,.3
Package shape	-	SQUARE	-	SQUARE	RECTANGULAR
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	-	260	260
Certification status	-	Not Qualified	-	Not Qualified	Not Qualified
Maximum seat height	-	0.8 mm	-	0.8 mm	1.75 mm
surface mount	-	YES	-	YES	YES
Switch configuration	-	PUSH-PULL	-	PUSH-PULL	PUSH-PULL
Maximum switching frequency	-	850 kHz	-	850 kHz	850 kHz
technology	-	CMOS	-	CMOS	CMOS
Temperature level	-	COMMERCIAL EXTENDED	-	COMMERCIAL EXTENDED	COMMERCIAL EXTENDED
Terminal surface	-	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	NO LEAD	-	NO LEAD	GULL WING
Terminal pitch	-	0.45 mm	-	0.45 mm	0.635 mm
Terminal location	-	DUAL	-	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	-	30	30
width	-	3 mm	-	3 mm	3.899 mm

Recommended Resources

Single channel infrared remote control receiving circuit

Frequency sensitive rheostat manual single phase starting circuit

Corridor light delay switch circuit three

Zero voltage switching low power test controller

LED slow charging circuit

Pulse dialing nine-channel infrared remote control circuit (LR40992, μPC1373)

Shortcut: L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 LA LB LC LD LE LF LG LH LI LJ LK LL LM LN LO LP LQ LR LS LT LU LV LW LX LY LZ M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ N0 N1 N2 N3 N4 N5 N6 N7 N8 NA NB NC ND NE NF NG NH NI NJ NK NL NM NN NO NP NQ NR NS NT NU NV NX NZ O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OP OQ OR OS OT OV OX OY OZ P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ Q1 Q2 Q3 Q4 Q5 Q6 Q8 Q9 QA QB QC QE QF QG QH QK QL QM QP QR QS QT QV QW QX QY R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 RA RB RC RD RE RF RG RH RI RJ RK RL RM RN RO RP RQ RR RS RT RU RV RW RX RY RZ

Popular Components