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參數(shù)資料
| 型號： | LM2706 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Miniature, Variable, Step-Down DC-DC Converter with Bypass for RF Power Amplifiers |
| 中文描述： | 微型，變，降壓型DC - DC與RF功率放大器繞道轉換器 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 451K |
| 代理商： | LM2706 |
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, PV
IN
, V
DD
to SGND
PGND to SGND
EN, FB, BYP, ABD, V
CON
0.2V to +6V
0.2V to +0.2V
(SGND 0.2V) to
(V
DD
+0.2V)
(PGND 0.2V) to
(V
DD
+0.2V)
SW
PV
IN
to V
DD
Storage Temperature Range
Lead Temp. (Soldering, 10 sec)
Junction Temperature (Note 2)
Minimum ESD Rating
(Human Body Model, C = 100 pF, R = 1.5 k
)
Thermal Resistance (
θ
JA
) (Note 3)
0.2V to +0.2V
45C to +150C
260C
+125C
±
2 kV
137C/W
Electrical Characteristics
Specifications with standard typeface are for T
A
= T
J
= 25C, and those in
boldface type
apply over the full
Operating Tem-
perature Range
of T
A
= T
J
= 25C to +85C. Unless otherwise specified, PV
IN
= V
DD
= EN = 3.6V, BYP = ABD = V
CON
= 0V.
Symbol
Parameter
Conditions
V
IN
Input Voltage Range (Note 4)
PV
IN
= V
DD
= V
IN
V
FB, MIN
Regulated feedback voltage at
minimum setting
T
A
= 25C
V
FB, MIN
Regulated feedback voltage at
minimum setting
V
FB, MAX
Regulated feedback voltage at
maximum setting
T
A
= 25C
V
FB, MAX
Regulated feedback voltage at
maximum setting
OVP
Over-Voltage protection Threshold
V
CON
= 0V (Note 5)
V
BYPASS
Auto Bypass Detection Threshold
V
CON
= 1.7V (Note 6)
V
BYPASS+
Auto Bypass Detection Threshold
V
CON
= 1.7V (Note 6)
I
SHDN
Shutdown Supply Current
EN = ABD = BYP = SW = FB = 0V
T
A
= 25C (Note 7)
I
SHDN
Shutdown Supply Current
EN = ABD = BYP = SW = FB = 0V
T
A
= 55C (Note 7)
I
SHDN
Shutdown Supply Current
EN = ABD = BYP = SW = FB = 0V
T
A
= 85C (Note 7)
I
Q1_PWM
DC Bias Current into V
DD
FB = 2V, No-Load, V
CON
= 0V
I
Q2_BYPASS
V
IN
= BYP = 3.6V,
No-Load, V
CON
= 0V
R
DSON(P)
Pin-Pin Resistance for P FET
R
DSON(N)
Pin-Pin Resistance for N FET
R
DSON(BYP)
Pin-Pin Resistance for Bypass
FET
I
LIM, PFET
Switch Peak Current Limit
(Note 8)
I
LIM, BYPASS
Bypass FET Peak Current Limit
(Note 8)
F
OSC
Internal Oscillator Frequency
V
IH
Logic High Input, EN, BYP, ABD
V
IL
Logic Low Input, EN, BYP, ABD
I
PIN
Pin Pull Down Current, EN, BYP,
ABD
V
CON,MIN
V
CON
Threshold Commanding
V
FB,MIN
V
CON,MAX
V
CON
Threshold Commanding
V
FB,MAX
Z
CON
V
CON
Input Resistance
Min
2.7
Typ
3.6
Max
5.5
Units
V
V
CON
= 0V
1.47
1.50
1.53
V
V
CON
= 0V
1.455
1.50
1.545
V
V
CON
= 1.70V
3.185
3.25
3.315
V
V
CON
= 1.70V
3.15
3.25
3.35
V
260
160
310
350
275
440
445
390
570
mV
mV
mV
0.1
1
μA
0.45
2
μA
6
25
μA
1.4
1.8
mA
1.45
1.8
260
200
500
500
m
m
105
200
m
550
480
500
650
650
600
750
930
700
1.2
mA
mA
kHz
V
V
0.5
EN, BYP, ABD = 3.6V
5
10
μA
PWM Mode, V
CON
Swept Down
0.55
0.6
0.65
V
PWM Mode, V
CON
Swept Up
1.5
1.6
1.7
V
100
k
L
www.national.com
3
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