双N通道mosfetCXSD6277/A/B车载直流-直流转换器低成本的同步降压调节器VCC和VC电源的上电复位POR外部可编程软启动检测到输出短路时锁定设备的电压检测

CXSD6277/A/B系列设计用于为车载直流-直流转换器应用提供低成本的同步降压调节器。CXSD6277系列和双N通道mosfetCXSD6277/A/B系列旨在提供低成本的同步降压调节器，用于车载直流-直流转换器应用。CXSD6277/A/B与双N通道mosfet串联，提供这种应用的低成本解决方案

目录

1.产品概述                       2.产品特点
3.应用范围                       4.下载产品资料PDF文档 
5.产品封装图                     6.电路原理图                   
7.功能概述                        8.相关产品

一,产品概述(General Description)   

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          The CXSD6277/A/B series are designed to provide a low cost synchronous
Buck regulator for on-board DC to DC con-verter applications. The CXSD6277/A/B
series together with dual N-channel MOSFETs , provide a
low cost solution for such applications. Each device fea-tures an internal
200/400kHz oscillator, Power-On-Reset (POR) for both VCC and VC supplies,
an external pro-grammable soft-start function as well as output under-
voltage detection that latches off the device when an out-put short is detected.
二.产品特点(Features)

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1.)Operating with Single 5V or 12V Input
2.)Drives N-Channel MOSFETs
3.)Simple Single-Loop Control Design
     Voltage-Mode PWM Control
     Full 0% to 100% Duty Ratio
     Fast Transient Response
4.)±2% Output Voltage Accuracy Over Temperature
5.)Under-Voltage Protection for Output
6.)200/400kHz Constant Frequency Operation
    200kHz for CXSD6277/A/BB
    400kHz for CXSD6277/A/BA
7.)Small size, 8-PIN Package (SOIC or TSSOP)
8.)Lead Free and Green Devices Available (RoHS Compliant)
三,应用范围 (Applications)

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Graphics Cards
DDR Memory Power Supply
DDR Memory Termination Voltage
Low-Voltage Distributed Power Supplies
四.下载产品资料PDF文档 

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需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

五,产品封装图 (Package)

FB (Pin 1)
Connect this pin to the output (VOUT) of the PWM con-verter via an external resistor divider to provide a voltage
feedback path for the converter. The output voltage set by the resistor divider is determined using the following 

for-where ROUT is the resistor connected from VOUT to FB, and RGND is the resistor connected from FB to 

ground.The voltage at this pin is also monitored for Under-Volt-age protection.
VCC (Pin 2)
Connect this pin to input voltage from 5V to 20V. This pin provides the bias for the control circuitry and the 

power MOSFET driver (LDRV). The voltage at this pin is monitored for Power-On-Reset (POR) purpose.
LDRV (Pin 3)
Connect this pin to the gate of the low-side power MOSFET. This pin provides the gate drive for the MOSFET.
GND (Pin 4)
Signal and power ground for the IC. All voltage levels are measured with respect to this pin.
HDRV (Pin 5)
Connect this pin to the gate of the high-side power MOSFET. This pin provides the gate drive for the MOSFET.
VC (Pin 6)
This pin provides bias voltage to the high-side MOSFET driver. A bootstrap circuit may be used to pump a boot
voltage for enforcing the driving capability of the gate driver and improving the performance of the MOSFET.
COMP (Pin 7)
This pin is the output of the error amplifier. Add an exter-nal resistor-capacitor network to provide a loop compen-
sation for the PWM converter.

SS (Pin 8)
Connect a capacitor from this pin to ground.This capacitor,along with an internal 20μA current source, sets the soft-
start interval of the PWM converter and prevents the out-puts from overshoot as well as limits the input current.

Pull this pin below 0.5V can shutdown the converter.
六.电路原理图

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七,功能概述

Profile Feature	Sn-Pb Eutectic Assembly	Pb-Free Assembly
Average ramp-up rate (TL to TP)	3°C/second max.	3°C/second max.
Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts)	100°C 150°C 60-120 seconds	150°C 200°C 60-180 seconds
Time maintained above: - Temperature (TL) - Time (tL)	183°C 60-150 seconds	217°C 60-150 seconds
Peak/Classification Temperature (Tp)	See table 1	See table 2
Time within 5°C of actual Peak Temperature (tp)	10-30 seconds	20-40 seconds
Ramp-down Rate	6°C/second max.	6°C/second max.
Time 25°C to Peak Temperature	6 minutes max.	8 minutes max.

八,相关产品                         更多同类产品...... 

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Switching Regulator >   Buck Controller
Part_No	Package	Archi tectu	Phase	No.of PWM Output	Output  Current (A)	Input Voltage (V)		Reference Voltage (V)	Bias  Voltage (V)	Quiescent Current (uA)
						min	max
CXSD6273	SOP-14 QSOP-16 QFN4x4-16	VM	1	1	30	2.9	13.2	0.9	12	8000
CXSD6274	SOP-8	VM	1	1	20	2.9	13.2	0.8	12	5000
CXSD6274C	SOP-8	VM	1	1	20	2.9	13.2	0.8	12	5000
CXSD6275	QFN4x4-24	VM	2	1	60	3.1	13.2	0.6	12	5000
CXSD6276	SOP-8	VM	1	1	20	2.2	13.2	0.8	5~12	2100
CXSD6276A	SOP-8	VM	1	1	20	2.2	13.2	0.8	5~12	2100
CXSD6277/A/B	SOP8|TSSOP8	VM	1	1	5	5	13.2	1.25|0.8	5~12	3000
CXSD6278	SOP-8	VM	1	1	10	3.3	5.5	0.8	5	2100
CXSD6279B	SOP-14	VM	1	1	10	5	13.2	0.8	12	2000
CXSD6280	TSSOP-24 |QFN5x5-32	VM	1	2	20	5	13.2	0.6	5~12	4000
CXSD6281N	SOP14 QSOP16 QFN-16	VM	1	1	30	2.9	13.2	0.9	12	4000
CXSD6282	SOP-14	VM	1	1	30	2.2	13.2	0.6	12	5000
CXSD6282A	SOP-14	VM	1	1	30	2.2	13.2	0.6	12	5000
CXSD6283	SOP-14	VM	1	1	25	2.2	13.2	0.8	12	5000
CXSD6284/A	LQFP7x7 48 TQFN7x7-48	VM	1	6	0.015	1.4	6.5	-	5	1800
CXSD6285	TSSOP-24P	VM	1	2	20	2.97	5.5	0.8	5~12	5000
CXSD6286	SOP-14	VM	1	1	10	5	13.2	0.8	12	3000
CXSD6287	SOP-8-P|DIP-8	VM	1	1	30	2.9	13.2	1.2	12	3000
CXSD6288	SSOP28 QFN4x4-24	VM	1	2	20	5	24	0.9	5	1200
CXSD6289	SOP-20	VM	1	2	20	2.2	13.2	0.6	5~12	4000
CXSD6290	SOP8|DFN3x3-10	VM	1	2	-	-	-	-	5~12	550
CXSD6291HC	DIP8|SOP-8	VM	1	1	1	1.2	9	24	5	9 ~ 24
CXSD6292	SSOP16 QFN4x4-16 TQFN3x3-16	VM	1	1	25	3	25	0.6	5	1700
CXSD6293	TDFN3x3-10	COT	1	1	25	3	25	0.5	5	350
CXSD6294	QFN4x4-24	CM	2	1	40	4.5	13.2	0.6	5~12	4000
CXSD6295	SOP8P TDFN3x3-10	VM	1	1	20	3	13.2	0.8	5~12	2500
CXSD6296A|B|C|D	SOP8P	VM	1	1	25	3	13.2	0.6|0.8	5~12	1200
CXSD6297	TDFN3x3-10	VM	1	1	25	4	13.2	0.8	5~12	2000
CXSD6298	TDFN3x3-10	COT	1	1	25	4.5	25	0.6	5~12	80
CXSD6299|A	SOP-8P	VM	1	1	25	4.5	13.2	0.8	5~12	16000
CXSD62100	TQFN3x3-10	VM	1	1	25	4.5	13.2	0.6	5~12	2500
CXSD62101|L	TDFN3x3-10	COT	1	1	30	3	25	0.8	5~12	2000
CXSD62102	TQFN3x3-16	COT	1	1	30	1.8	28	0.6	5	600
CXSD62102A	TQFN 3x3 16	COT	1	1	30	1.8	28	0.6	5	600
CXSD62103	QFN4x4-24	VM	2	1	50	4.5	13.2	0.6	5~12	5000
CXSD62104	TQFN4x4-24	COT	1	2	15	6	25	2	N	550
CXSD62105	TQFN4x4-24	COT	1	2	15	6	25	2	N	550
CXSD62106|A	TQFN4x4-4 TQFN3x3-20	COT	1	2	20	3	28	0.75	5	800
CXSD62107	TQFN3x3-16	COT	1	1	20	1.8	28	0.75	5	400
CXSD62108	QFN3.5x3.5-14 TQFN3x3-16	COT	1	1	20	1.8	28	0.75	5	400
CXSD62109	TQFN3x3-16	COT	1	2	20	1.8	28	0.75	5	400
CXSD62110	QFN3x3-20 TQFN3x3-16	COT	1	2	20	3	28	1.8|1.5|0.5	5	740
CXSD62111	TQFN4x4-24 |QFN3x3-20	CM	1	2	15	5	28	0.5	N	3000
CXSD62112	TDFN3x3-10	COT	1	1	20	1.8	28	0.5	5	250
CXSD62113|C	TQFN3x3-20	COT	1	2	15	6	25	2	N	550
CXSD62113E	TQFN 3x3 20	COT	2	2	11	6	25	2	N	550
CXSD62114	TQFN3x3-20	COT	2	2	11	5.5	25	2	N	280
CXSD62115	QFN4x4-24	VM	2	1	60	3.1	13.2	0.85	12	5000
CXSD62116A|B|C	SOP-8P	VM	1	1	20	2.9	13.2	0.8	12	16000
CXSD62117	SOP-20	VM	2	2	30	10	13.2	1	12	5000
CXSD62118	TDFN3x3-10	COT	1	1	25	1.8	28	0.7	5	250
CXSD62119	TQFN3x3-20	COT	2	1	40	1.8	25	REFIN Setting	5	700
CXSD62120	QFN 3x3 20 TQFN 3x3 16	COT	1	2	20	3	28	1.8|1.5 1.35|1.2 0.5	5	800
CXSD62121A	TQFN3x3 20	COT	1	2	15	3	28	0.75	5	220
CXSD62121B	TQFN3x3 20	COT	1	2	15	3	28	0.75	5	220
CXSD62121	TQFN3x3-20	COT	1	2	20	3	28	0.75	5	180