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LTC3776EGN#PBF: 产品描述IC CTLR SYNC DUAL 24-SSOP; 产品类别电源/电源管理电源电路; 文件大小1MB，共4页; 制造商Linear ( ADI ); 官网地址http://www.analog.com/cn/index.html; 标准

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LTC3776EGN#PBF概述

IC CTLR SYNC DUAL 24-SSOP

LTC3776EGN#PBF规格参数

参数名称	属性值
Brand Name	Linear Technology
是否Rohs认证	符合
厂商名称	Linear ( ADI )
零件包装代码	SSOP
包装说明	SSOP, LCC24,.16SQ,20
针数	24
制造商包装代码	GN
Reach Compliance Code	compliant
ECCN代码	EAR99
模拟集成电路 - 其他类型	DUAL SWITCHING CONTROLLER
控制模式	CURRENT-MODE
最大输入电压	9.8 V
最小输入电压	2.75 V
标称输入电压	4.2 V
JESD-30 代码	R-PDSO-G24
JESD-609代码	e3
长度	8.649 mm
湿度敏感等级	1
功能数量	1
端子数量	24
最高工作温度	70 °C
最低工作温度
最大输出电流	1 A
封装主体材料	PLASTIC/EPOXY
封装代码	SSOP
封装等效代码	LCC24,.16SQ,20
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）	260
认证状态	Not Qualified
座面最大高度	1.727 mm
表面贴装	YES
切换器配置	PUSH-PULL
最大切换频率	825 kHz
技术	CMOS
温度等级	COMMERCIAL
端子面层	Matte Tin (Sn)
端子形式	GULL WING
端子节距	0.635 mm
端子位置	DUAL
处于峰值回流温度下的最长时间	30
宽度	3.899 mm

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2-PHASE DUAL STEP-DOWN CONVERTER FOR DDR/QDR MEMORY TERMINATION

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 829

LTC3776EUF

DESCRIPTION

Demonstration circuit 829 is a high efficiency 2-phase

dual synchronous step-down DC/DC converter for

DDR/QDR memory termination applications featuring

the LTC3776EUF controller. The input voltage range of

the board is from 2.75V to 8V. It has two outputs:

2.5V (5A maximum at 5V input) and 1.25V (+/-5A

maximum at 5V input). The channel 2 output voltage

out2

) tracks ½ V

out1

ref

) and is capable of providing

symmetrical source/sink output current. The constant

frequency current mode architecture with MOSFET

sensing eliminates the need for sense resistors

and improves efficiency. Out of phase operation sig-

nificantly reduces input ripple current as well as the

input capacitor size.

Table 1. Performance Summary (T

= 25°C)

PARAMETER

Input Voltage Range

OUT1

= 2.75-8V, I

OUT1

= 0A to 5A,

OUT2

= 0A to 5A

OUT2

= 2.75-8V, I

OUT1

= 0A to 5A,

OUT2

= 0A to 5A

Maximum load current I

OUT1

Maximum load current I

OUT2

Typical Output Ripple V

OUT1

Typical Output Ripple V

OUT2

Typical Switching Frequency

Typical Spread Spectrum Frequency Range

= 5V

= 3.3V, I

OUT1

= 3A (20MHz BW)

= 3.3V, I

OUT2

= 3A (20MHz BW)

PLLLPF Pin Floating; JP1:300K/550K/750KHz

JP1: Spread Spectrum

+/-5A

20mV

P–P

7mV

P–P

550kHz

450kHz- 580kHz

1.25V ±2.5%

CONDITION

VALUE

2.75V to 8V

2.5V ±2.5%

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

switching frequency can also be externally synchro-

nized from 250KHz to 850KHz using SYNC pin (JP1:

SYNC).

The demo board can be selected to operate in spread

spectrum mode (JP1: Spread Spectrum) with signifi-

cantly reduced peak switching noise.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Demonstration circuit 829 is easy to set up to evalu-

ate the performance of LTC3776. Refer to Figure 1 for

proper measurement equipment setup and follow the

procedure below:

NOTE:

When measuring the input or output voltage

ripple, care must be taken to avoid a long ground lead

on the oscilloscope probe. Measure the input or out-

put voltage ripple by touching the probe tip directly

LTC3776EGN#PBF相似产品对比

	LTC3776EGN#PBF	DC829A	LTC3776EUF#PBF	LTC3776EUF#TRPBF	LTC3776EGN#TRPBF
描述	IC CTLR SYNC DUAL 24-SSOP	board eval for ltc3776euf	IC CNTRLR SYNC DUAL 24-QFN	IC CNTRLR SYNC DUAL 24-QFN	IC CNTRLR SYNC DUAL 24-SSOP
Brand Name	Linear Technology	-	Linear Technology	Linear Technology	Linear Technology
是否Rohs认证	符合	-	符合	符合	符合
厂商名称	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
零件包装代码	SSOP	-	QFN	QFN	SSOP
包装说明	SSOP, LCC24,.16SQ,20	-	HVQCCN, SSOP24,.24	HVQCCN, LCC24,.16SQ,20	SSOP, SSOP24,.24
针数	24	-	24	24	24
制造商包装代码	GN	-	UF	UF	GN
Reach Compliance Code	compliant	-	compliant	compliant	compliant
ECCN代码	EAR99	-	EAR99	EAR99	EAR99
模拟集成电路 - 其他类型	DUAL SWITCHING CONTROLLER	-	DUAL SWITCHING CONTROLLER	DUAL SWITCHING CONTROLLER	DUAL SWITCHING CONTROLLER
控制模式	CURRENT-MODE	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
最大输入电压	9.8 V	-	9.8 V	9.8 V	9.8 V
最小输入电压	2.75 V	-	2.75 V	2.75 V	2.75 V
标称输入电压	4.2 V	-	4.2 V	4.2 V	4.2 V
JESD-30 代码	R-PDSO-G24	-	S-PQCC-N24	S-PQCC-N24	R-PDSO-G24
JESD-609代码	e3	-	e3	e3	e3
长度	8.649 mm	-	4 mm	4 mm	8.649 mm
湿度敏感等级	1	-	1	1	1
功能数量	1	-	1	1	1
端子数量	24	-	24	24	24
最高工作温度	70 °C	-	70 °C	70 °C	70 °C
最大输出电流	1 A	-	1 A	1 A	1 A
封装主体材料	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SSOP	-	HVQCCN	HVQCCN	SSOP
封装等效代码	LCC24,.16SQ,20	-	SSOP24,.24	LCC24,.16SQ,20	SSOP24,.24
封装形状	RECTANGULAR	-	SQUARE	SQUARE	RECTANGULAR
封装形式	SMALL OUTLINE, SHRINK PITCH	-	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）	260	-	260	260	250
认证状态	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified
座面最大高度	1.727 mm	-	0.8 mm	0.8 mm	1.727 mm
表面贴装	YES	-	YES	YES	YES
切换器配置	PUSH-PULL	-	PUSH-PULL	PUSH-PULL	PUSH-PULL
最大切换频率	825 kHz	-	825 kHz	825 kHz	825 kHz
技术	CMOS	-	CMOS	CMOS	CMOS
温度等级	COMMERCIAL	-	COMMERCIAL	COMMERCIAL	COMMERCIAL
端子面层	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
端子形式	GULL WING	-	NO LEAD	NO LEAD	GULL WING
端子节距	0.635 mm	-	0.5 mm	0.5 mm	0.635 mm
端子位置	DUAL	-	QUAD	QUAD	DUAL
处于峰值回流温度下的最长时间	30	-	30	30	NOT SPECIFIED
宽度	3.899 mm	-	4 mm	4 mm	3.899 mm

LTC3776EGN#PBF

LTC3776EGN#PBF概述

LTC3776EGN#PBF规格参数

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LTC3776EGN#PBF相似产品对比

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