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參數(shù)資料
| 型號： | ISL6523 |
| 廠商： | Intersil Corporation |
| 英文描述： | Adjustable Precision Shunt Regulator 3-SOT-23 0 to 70 |
| 中文描述： | VRM8.5雙雙PWM和線性電源系統(tǒng)控制器 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 498K |
| 代理商： | ISL6523 |
14
The power dissipation in PWM2 converter is similar to
PWM1 except that the power losses of the lower device are
dissipated in the Schottky. The equations below describe an
approximation of this power loss distribution and assume
linear voltage-current switching transitions.
Linear Controllers Transistor Selection
The ISL6523 linear controllers are compatible with both NPN
bipolar as well as N-channel MOSFET transistors. The main
criteria for selection of pass transistors for the linear
regulators is package selection for efficient removal of heat.
The power dissipated in a linear regulator is
Select a package and heatsink that maintains the junction
temperature below the maximum desired temperature with
the maximum expected ambient temperature.
When selecting bipolar NPN transistors for use with the
linear controllers, insure the current gain at the given
operating V
CE
is sufficiently large to provide the desired
output load current when the base is fed with the minimum
driver output current.
In order to ensure the strict timing/level requirement of
OUT4, an NPN transistor is recommended for use as a pass
element on this output (Q5). An low gate threshold NMOS
could be used, but meeting the requirements would then
depend on the VCC bias being sufficiently high to allow
control of the MOSFET.
FIGURE 12. UPPER GATE DRIVE - DIRECT V
CC
DRIVE
+12V
PGND
ISL6523
GND
LGATE
UGATE
PHASE
V
CC
+5V OR LESS
NOTE:
V
GS
≈
V
CC
-5V
NOTE:
V
GS
≈
V
CC
Q1
Q2
+
-
CR1
P
MOS
I
------------------------------------------------------------
2
r
IN
×
V
×
I
----------------------------------------------------
V
×
t
×
F
S
×
+
=
P
SCH
I
--------------------------------------–
V
×
V
V
IN
)
=
P
LINEAR
I
O
V
IN
V
OUT
–
(
)
×
=
ISL6523
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|---|---|
| ISL6523ACB | Adjustable Precision Shunt Regulator 3-SOT-89 0 to 70 |
| ISL6523CB | Adjustable Precision Shunt Regulator 5-SOT-23 -40 to 85 |
| ISL6523CBZ | Adjustable Precision Shunt Regulator 5-SOT-23 -40 to 85 |
| ISL6523CBZ-T | VRM8.5 Dual PWM and Dual Linear Power System Controller |
| ISL6523CB-T | Label Printer; Leaded Process Compatible:Yes |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6523ACB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL6523CB | 功能描述:IC CTRLR VRM8.5 PWM DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| ISL6523CB-T | 功能描述:IC CTRLR VRM8.5 PWM DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應商設備封裝:42-WLP 包裝:帶卷 (TR) |
| ISL6523CBZ | 功能描述:IC CTRLR VRM8.5 PWM DUAL 28-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6523CBZ-T | 功能描述:IC CTRLR VRM8.5 PWM DUAL 28-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
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