DataSheet.jp

R5973AD の電気的特性と機能

R5973ADのメーカーはSTMicroelectronicsです、この部品の機能は「Up to 1.5A step-down switching regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 R5973AD
部品説明 Up to 1.5A step-down switching regulator
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




このページの下部にプレビューとR5973ADダウンロード(pdfファイル)リンクがあります。

Total 30 pages

No Preview Available !

R5973AD Datasheet, R5973AD PDF,ピン配置, 機能
R5973AD
Up to 1.5 A step-down switching regulator for aerospace
applications
Datasheet - preliminary data
– Designed and manufactured to meet sub-
ppm quality goals
– Advanced mold and frame designs for
superior resilience in harsh environments
(acceleration, EMI, thermal, humidity)
– Extended screening capability on request
HSOP8 - exposed pad
Features
General features
– 1.5 A DC output current
– Operating input voltage from 4 V to 36 V
– 3.3 V / (± 2%) reference voltage
– Large ambient temperature range:
-40 °C to 125 °C
– Output voltage adjustable from 1.235 V to
VIN
– Low dropout operation: 100% duty cycle
– 500 kHz internally fixed frequency
– Voltage feed-forward
– Zero load current operation
– Internal current limiting
– Inhibit for zero current consumption
– Synchronization
– Protection against feedback disconnection
– Thermal shutdown
Aerospace and defense features
– Suitable for use in aerospace and defense
applications
– Dedicated traceability and part marking
– Production parts approval documents
available
– Adapted extended life time and
obsolescence management
– Extended product change notification
process
Applications
Dedicated to aerospace applications
Description
The R5973AD is a step-down monolithic power
switching regulator with a minimum switch current
limit of 1.8 A, so it is able to deliver up to 1.5 A DC
current to the load depending on the application
conditions. The output voltage can be set from
1.235 V to VIN. The high current level is also
achieved thanks to an HSOP8 package with an
exposed frame, that allows to reduce the Rth(JA)
down to approximately 40 °C/W. The device uses
an internal P-channel DMOS transistor (with
a typical RDS(on) of 250 m) as a switching
element to minimize the size of the external
components. An internal oscillator fixes the
switching frequency at 500 kHz. The large
ambient temperature range makes it ideal for
aerospace and defense applications. A pulse-by-
pulse current limit with the internal frequency
modulation offers an effective constant current
short-circuit protection.
October 2014
DocID027027 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/38
www.st.com

1 Page





R5973AD pdf, ピン配列
R5973AD
Contents
8 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.1 Component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.2 Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.3 Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.4 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.5 Positive buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.6 Negative buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.7 Synchronization example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.8 Compensation network with MLCC at the output . . . . . . . . . . . . . . . . . . . 31
8.9 External SOFT_START network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DocID027027 Rev 1
3/38
38


3Pages


R5973AD 電子部品, 半導体
Electrical characteristics
3 Electrical characteristics
R5973AD
TJ = -40 °C to 125 °C, VCC = 12 V, unless otherwise specified.
Symbol
Table 4. Electrical characteristics
Parameter
Test condition
Min. Typ. Max.
VCC
RDS(on)
Operating input voltage range
MOSFET on resistance
IL Maximum limiting current(1)
fSW Switching frequency
Duty cycle
Dynamic characteristics
V5 Voltage feedback
h Efficiency
DC characteristics
VCC = 5 V
VCC = 5 V, TJ = 25 °C
4.4 V < VCC < 36 V
V0 = 5 V, VCC = 12 V
4 36
0.250 0.5
1.8 2.3
2 2.3
425 500 575
0 100
1.198 1.235 1.272
90
Iqop
Iq
Iqst-by
Inhibit
Total operating quiescent
current
Quiescent current
Duty cycle = 0; VFB = 1.5 V
Total standby quiescent current Vinh > 2.2 V
57
2.7
50 100
INH threshold voltage
Device ON
Device OFF
0.8
2.2
Error amplifier
VOH
VOL
Io source
Io sink
Ib
High level output voltage
Low level output voltage
Source output current
Sink output current
Source bias current
DC open loop gain
gm Transconductance
Synch function
VFB = 1 V
VFB = 1.5 V
VCOMP = 1.9 V; VFB = 1 V
VCOMP = 1.9 V; VFB = 1.5 V
RL =
ICOMP = -0.1 mA to 0.1 mA;
VCOMP = 1.9 V
3.5
0.4
190 300
1 1.5
2.5 4
50 57
2.3
High input voltage
Low input voltage
Slave synch current(2)
VCC = 4.4 to 36 V
VCC = 4.4 to 36 V
Vsynch = 0.74 V, Vsynch = 2.33 V
2.5
0.11
0.21
VREF
0.74
0.25
0.45
Unit
V
A
kHz
%
V
%
mA
mA
A
V
V
V
V
A
mA
A
dB
mS
V
V
mA
6/38 DocID027027 Rev 1

6 Page



ページ 合計 : 30 ページ
 
PDF
ダウンロード
[ R5973AD データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
R5973AD

Up to 1.5A step-down switching regulator

STMicroelectronics
STMicroelectronics


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap