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LTC3770EUH#TRPBF: 产品描述IC REG CTRLR BUCK 32QFN; 产品类别电源/电源管理电源电路; 文件大小192KB，共5页; 制造商Linear ( ADI ); 官网地址http://www.analog.com/cn/index.html; 标准

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LTC3770EUH#TRPBF概述

IC REG CTRLR BUCK 32QFN

LTC3770EUH#TRPBF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	QFN
包装说明	HVQCCN, LCC32,.2SQ,20
针数	32
制造商包装代码	UH
Reach Compliance Code	compliant
ECCN代码	EAR99
模拟集成电路 - 其他类型	SWITCHING CONTROLLER
控制模式	CURRENT-MODE
控制技术	PULSE WIDTH MODULATION
最大输入电压	32 V
最小输入电压	4 V
标称输入电压	15 V
JESD-30 代码	S-PQCC-N32
JESD-609代码	e3
长度	5 mm
湿度敏感等级	1
功能数量	1
端子数量	32
最高工作温度	85 °C
最低工作温度
最大输出电流	4 A
封装主体材料	PLASTIC/EPOXY
封装代码	HVQCCN
封装等效代码	LCC32,.2SQ,20
封装形状	SQUARE
封装形式	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）	260
认证状态	Not Qualified
座面最大高度	0.8 mm
表面贴装	YES
切换器配置	PUSH-PULL
技术	CMOS
温度等级	OTHER
端子面层	Matte Tin (Sn)
端子形式	NO LEAD
端子节距	0.5 mm
端子位置	QUAD
处于峰值回流温度下的最长时间	30
宽度	5 mm

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HIGH EFFICIENCY, HIGH POWER BUCK CONVERTER WITH MARGINING AND

TRACKING

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 774

LTC3770EUH

DESCRIPTION

Demonstration circuit 774 is a high efficiency synchro-

nous step-down DC/DC converter with 5V to 28V input

range. It can provide 2.5V output with 10A maximum

current. The demo board features the LTC3770EUH con-

troller. The LTC3770 has a high accuracy +/-0.67% 0.6V

reference voltage and provides many advanced functions

including output tracking, programmable voltage mar-

gining, programmable current limit, output over voltage

protection and input under voltage lockout, power good

Table 1. Performance Summary (T

= 25°C)

PARAMETER

Input Voltage Range

Output Voltage

Maximum load current

Typical Output Ripple

Typical Switching Frequency

= 5-28V, I

OUT

= 0A to 10A,

= 5-28V

= 12V, I

OUT

= 10A (20MHz BW)

= 12V, I

OUT

= 10A

CONDITION

VALUE

5V to 28V

2.5V ±2%

10A

60mV

P–P

250kHz

monitor, programmable soft start, selectable discontinu-

ous operation mode or forced continuous mode at light

load, and adjustable dead time between the top gate and

bottom gate signals to optimize the efficiency.

Design files for this circuit board are available. Call

the LTC factory.

OPERATING PRINCIPLES

The LTC3770 uses a constant on-time, valley current

mode control architecture able to deliver very low duty

cycles with fast transient response without requiring a

sense resistor. The switching frequency of the converter

can be selected by an external resistor Ron and is com-

pensated for variations on input supply voltage. An in-

ternal phase-lock loop allows the controller to be syn-

chronized to an external clock. Figure 3 gives the effi-

ciency curves (JP1: DCM).

The LTC3770 has the output voltage up and down track-

ing capability. Using the TRACK/SS pin, the converter

output can track another supply’s output voltage. To se-

lect tracking function, place JP2 at TRACK, take off the

soft start cap Css and connect a resistor divider to the

external voltage to be tracked. The tracking can be coin-

cident or ratiometric, as shown in figure 4.

Voltage margining is the dynamic adjustment of the out-

put voltage to its worst case operating range during test

to screen the components, verify some con-

trol/protection functionality of the board and improve the

system reliability. The LTC3770 has two logic control

pins, MARGIN1 and MARGIN0, to enable and set up

margin up (higher output voltage) or margin down

(lower output voltage). Table 2 is a summary of the con-

figurations.

When the margining function is enabled, the error ampli-

fier reference voltage will be adjusted to: V

REFIN

=0.6V +/-

1.18VxR5/R6

LTC3770EUH#TRPBF相似产品对比

	LTC3770EUH#TRPBF	DC774A	LTC3770EG#TRPBF	LTC3770EUH#PBF	LTC3770EG#PBF
描述	IC REG CTRLR BUCK 32QFN	board eval for ltc3770euf	IC REG CTRLR BUCK 28SSOP	IC REG CTRLR BUCK 32QFN	IC REG CTRLR BUCK 28SSOP
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	QFN	-	SSOP	QFN	SSOP
包装说明	HVQCCN, LCC32,.2SQ,20	-	SSOP, SSOP28,.3	HVQCCN, LCC32,.2SQ,20	SSOP, SSOP28,.3
针数	32	-	28	32	28
制造商包装代码	UH	-	G	UH	G
Reach Compliance Code	compliant	-	compliant	compliant	compliant
ECCN代码	EAR99	-	EAR99	EAR99	EAR99
模拟集成电路 - 其他类型	SWITCHING CONTROLLER	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
控制模式	CURRENT-MODE	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
控制技术	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
最大输入电压	32 V	-	32 V	32 V	32 V
最小输入电压	4 V	-	4 V	4 V	4 V
标称输入电压	15 V	-	15 V	15 V	15 V
JESD-30 代码	S-PQCC-N32	-	R-PDSO-G28	S-PQCC-N32	R-PDSO-G28
JESD-609代码	e3	-	e3	e3	e3
长度	5 mm	-	10.2 mm	5 mm	10.2 mm
湿度敏感等级	1	-	1	1	1
功能数量	1	-	1	1	1
端子数量	32	-	28	32	28
最高工作温度	85 °C	-	85 °C	85 °C	85 °C
最大输出电流	4 A	-	4 A	4 A	4 A
封装主体材料	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	HVQCCN	-	SSOP	HVQCCN	SSOP
封装等效代码	LCC32,.2SQ,20	-	SSOP28,.3	LCC32,.2SQ,20	SSOP28,.3
封装形状	SQUARE	-	RECTANGULAR	SQUARE	RECTANGULAR
封装形式	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	-	SMALL OUTLINE, SHRINK PITCH	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）	260	-	260	260	260
认证状态	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified
座面最大高度	0.8 mm	-	2 mm	0.8 mm	2 mm
表面贴装	YES	-	YES	YES	YES
切换器配置	PUSH-PULL	-	PUSH-PULL	PUSH-PULL	PUSH-PULL
技术	CMOS	-	CMOS	CMOS	CMOS
温度等级	OTHER	-	OTHER	OTHER	OTHER
端子面层	Matte Tin (Sn)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
端子形式	NO LEAD	-	GULL WING	NO LEAD	GULL WING
端子节距	0.5 mm	-	0.65 mm	0.5 mm	0.65 mm
端子位置	QUAD	-	DUAL	QUAD	DUAL
处于峰值回流温度下的最长时间	30	-	30	30	30
宽度	5 mm	-	5.3 mm	5 mm	5.3 mm

LTC3770EUH#TRPBF

LTC3770EUH#TRPBF概述

LTC3770EUH#TRPBF规格参数

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LTC3770EUH#TRPBF相似产品对比

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