參數(shù)資料
型號： LTC1708EG-PG
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Dual Adjustable 5-Bit VID High Efficiency, 2-Phase Current Mode Synchronous Buck Regulator Controller
中文描述： 3 A DUAL SWITCHING CONTROLLER, 310 kHz SWITCHING FREQ-MAX, PDSO36
封裝： 0.209 INCH, PLASTIC, SSOP-36
文件頁數(shù)： 4/32頁
文件大?。?/td> 358K
代理商： LTC1708EG-PG
4
LTC1708-PG
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC1708EG-PG is guaranteed to meet performance
specifications from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC1708EG-PG: T
J
= T
A
+ (P
D
85
°
C/W)
Note 4:
The LTC1708-PG is tested in a feedback loop that servos V
ITH1, 2
to a specified voltage and measures the resultant EAIN1, 2.
Note 5:
The supply current is higher due to the gate charge being delivered
at the switching frequency. See Applications Information.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 15V, V
RUN/SS1, 2
= 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VID Parameters
VIDV
CC
VID Operating Supply Voltage
I
VIDVCC
VID Supply Current
VIDV
CC
= 3.3V (Note 8)
R
FBOUT1/SENSE1
Resistance Between ATTNIN/ATTNOUT
R
RATIO
Resistor Ratio Accuracy
Programmed from 0.925V to 2.00V
R
PULL-UP
VID0 to VID4 Pull-Up Resistance
(Note 9) V
DIODE
= 0.7V
V
IDT
VID Voltage Threshold
I
VIDLEAK
VID Input Leakage Current
(Note 9) VIDV
CC
< VIDV
CC
< 7V
V
PULL-UP
VID Pull-Up Voltage
VIDV
CC
= 3V
The
G
denotes the specifications which apply over the full operating
TYPICAL PERFOR U
Efficiency vs Output Current
and Mode (Figure 12)
OUTPUT CURRENT (A)
0.1
0
E
20
30
40
50
60
70
1
10
15A
1708 G01
80
90
100
10
100
Burst Mode
OPERATION
CONSTANT FREQUENCY
MODE
PWM MODE
V
IN
= 15V
V
OUT
= 1.6V
OUTPUT CURRENT (A)
0.01
E
40
60
100
1708
G02
20
0
0.1
1
10
100
80
30
50
15A
10
90
70
V
IN
= 10V
V
IN
= 15V
V
IN
= 5V
V
FCB
= OPEN
V
OUT
= 1.6V
V
IN
= 20V
EXTV
CC
= 0V
INPUT VOLTAGE (V)
5
10
E
70
80
1708
G03
60
50
15
20
25
28
100
90
V
= 1.6V
EXTV
CC
= 0V
I
OUT
= 7A
I
OUT
= 12A
Efficiency vs Output Current
(Figure 12)
Efficiency vs Input Voltage
(Figure 12)
Note 6:
The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current
≥
40% of I
MAX
(see minimum on-time
considerations in the Applications Information section).
Note 7:
V
FREQSET
pin internally tied to 1.19V reference through a large
resistance.
Note 8:
With all five VID inputs floating (or tied to VIDV
CC
) the VIDV
CC
current is typically <1
μ
A. However, the VIDV
CC
current will rise and be
approximately equal to the number of grounded VID input pins times
(VIDV
CC
– 0.6V)/40k. (See the Applications Information section.)
Note 9:
Each built-in pull-up resistor attached to the VID inputs also has a
series diode to allow input voltages higher than the VIDV
CC
supply without
damage or clamping. (See Applications Information section.)
Note 10:
Rise and fall times are measured at 20% to 80% levels. Delay
and nonoverlap times are measured using 50% levels.
MIN
TYP
MAX
UNITS
2.7
5.5
5
5
V
0.01
10
0.25
40
1.0
0.1
2.8
μ
A
k
%
k
0.4
1.6
1
3.1
V
μ
A
V
2.5
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相關代理商/技術參數(shù)
參數(shù)描述
LTC1708EG-PG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
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LTC1708EG-PG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1709EG 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
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