參數(shù)資料
型號(hào): ISL6520ACB
廠商: INTERSIL CORP
元件分類: 穩(wěn)壓器
英文描述: Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
中文描述: SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PDSO8
封裝: PLASTIC, MS-012-AA, SOIC-8
文件頁(yè)數(shù): 8/10頁(yè)
文件大?。?/td> 353K
代理商: ISL6520ACB
8
FN9083.2
January 20, 2005
circumvented by these MOSFETs if they have large parasitic
impedences and/or capacitances that would inhibit the gate
of the MOSFET from being discharged below it’s threshold
level before the complementary MOSFET is turned on.
Figure 6 shows the upper gate drive (BOOT pin) supplied by a
bootstrap circuit from V
CC
. The boot capacitor, C
BOOT
,
develops a floating supply voltage referenced to the PHASE
pin. The supply is refreshed to a voltage of V
CC
less the boot
diode drop (V
D
) each time the lower MOSFET, Q
2
, turns on.
ISL6520B DC-DC Converter Application
Circuit
Figure 7 shows an application circuit of a DC-DC Converter.
Detailed information on the circuit, including a complete Bill-
of-Materials and circuit board description, can be found in
Application Note AN9932.
+5V
ISL6520B
GND
LGATE
UGATE
PHASE
BOOT
VCC
+5V
NOTE:
V
G-S
V
CC
-V
D
NOTE:
V
G-S
V
CC
C
BOOT
D
BOOT
Q1
Q2
+
-
FIGURE 6. UPPER GATE DRIVE BOOTSTRAP
+ V
D
-
Component Selection Notes:
C
IN
-
Each 330
m
F 6.3W
VDC
, Sanyo 6TPB330M or Equivalent.
C
OUT
-
Each 330
m
F 6.3W
VDC
, Sanyo 6TPB330M or Equivalent.
D1 - 30mA Schottky Diode, MA732 or Equivalent
L
1
- 3.1
μ
H Inductor, Panasonic P/N ETQ-P6F2ROLFA or Equivalent.
Q
1
, Q
2
-
Fairchild MOSFET; HUF76143.
FIGURE 7. 5V to 3.3V 15A DC-DC CONVERTER
+5V
V
OUT
FB
COMP/SD
UGATE
PHASE
BOOT
VCC
GND
LGATE
+
5
7
6
3
2
1
8
4
ISL6520B
+
3.16k
L
1
C
OUT
3 x 330
μ
F
D
1
0.1
μ
F
C
IN
2 x 1
μ
F
Q
1
Q
2
U
1
0.1
μ
F
POR
AND
REF
OSC
+
-
-
+
2 x 330
μ
F
0.1
μ
F
1.00k
10.0k
470pF
8200pF
60.4
18000pF
SOFT START
50k
ISL6520B
相關(guān)PDF資料
PDF描述
ISL6520ACBZ Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
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ISL6520ACBZ 功能描述:電壓模式 PWM 控制器 VER OF ISL6520ACB RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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ISL6520ACBZA-T 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:是 類別: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 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 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)