參數(shù)資料
型號(hào)： ISL6540A
廠商： Intersil Corporation
英文描述： Single-Phase Buck PWM Controller with Integrated High Speed MOSFET Driver and Pre-Biased Load Capability
中文描述： 單相降壓PWM控制器，帶有集成的高速M(fèi)OSFET驅(qū)動(dòng)器和預(yù)偏置負(fù)載能力
文件頁(yè)數(shù)： 15/20頁(yè)
文件大小： 430K
代理商： ISL6540A
15
FN6288.2
March 12, 2007
Application Guidelines
Layout Considerations
As in any high frequency switching converter, layout is very
important. Switching current from one power device to
another can generate voltage transients across the
impedances of the interconnecting bond wires and circuit
traces. These interconnecting impedances should be
minimized by using wide, short printed circuit traces. The
critical components should be located as close together as
possible using ground plane construction or single point
grounding.
Figure 7 shows the critical power components of the
converter. To minimize the voltage overshoot/undershoot the
interconnecting wires indicated by heavy lines should be part
of ground or power plane in a printed circuit board. The
components shown in Figure 8 should be located as close
together as possible. Please note that the capacitors C
IN
and C
O
each represent numerous physical capacitors.
Locate the ISL6540A within 3 inches of the MOSFETs, Q1
and Q2. The circuit traces for the MOSFETs’ gate and
source connections from the ISL6540A must be sized to
handle up to 4A peak current.
Proper grounding of the IC is important for correct operation
in noisy environments. The PGND pin should be connected
to board ground at the source of the low side MOSFET with
a wide short trace. The GND pin should be connected to a
large copper fill under the IC which is subsequently
connected to board ground at a quite location on the board,
typically found at an input or output bulk (electrolytic)
capacitor.
Figure 8 shows the circuit traces that require additional
layout consideration. Use single point and ground plane
construction for the circuits shown. Minimize any leakage
VSEN-
VSEN+
COMP
FB
VMON
R
FB
R
OS
Z
IN
Z
FB
OV/UV
COMP
ERROR AMP
C
SEN
1.8V
VCC
V
SS
10
Ω
10
Ω
VOUT (LOCAL)
GND (LOCAL)
VSENSE+
(REMOTE)
GAIN=1
VSENSE-
(REMOTE)
FIGURE 6. SIMPLIFIED UNITY GAIN DIFFERENITAL SENSING IMPLEMENTATION
PGND
L
O
C
O
LGATE
UGATE
PHASE
Q1
Q2
FIGURE 7. PRINTED CIRCUIT BOARD POWER AND
GROUND PLANES OR ISLANDS
V
IN
V
OUT
RETURN
ISL6540A
C
IN
L
FIGURE 8. PRINTED CIRCUIT BOARD SMALL SIGNAL
LAYOUT GUIDELINES
+5V
ISL6540A
SS
PGND
PVCC
BOOT
D1
L
O
C
O
V
OUT
L
Q1
Q2
PHASE
+V
IN
C
BOOT
C
PVCC
C
SS
GND
ISL6540A
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ISL6540ACRZ 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:75 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.3 V ~ 13.5 V 降壓:是 升壓:是 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:0°C ~ 70°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:管件 產(chǎn)品目錄頁(yè)面:1051 (CN2011-ZH PDF) 其它名稱(chēng):296-2543-5
ISL6540ACRZ-T 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤(pán) 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱(chēng):LM3754SQDKR
ISL6540ACRZ-TR5453 制造商:Intersil Corporation 功能描述:STD. ISL6540ACRZ-T W/GOLD BOND WIRE ONLY - Tape and Reel
ISL6540AIRZ 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR)
ISL6540AIRZA 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR)
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