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參數(shù)資料
| 型號(hào)： | LTC3728LZEUH |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A DUAL SWITCHING CONTROLLER, 590 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封裝： | 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-28 |
| 文件頁數(shù)： | 27/32頁 |
| 文件大?。?/td> | 467K |
| 代理商： | LTC3728LZEUH |
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LTC3728LZ
4
3728lzf
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Output
VPGL
PGOOD Voltage Low
IPGOOD = 2mA
0.1
0.3
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
±1
μA
VPG
PGOOD Trip Level, Either Controller
VOSENSE with Respect to Set Output Voltage
VOSENSE Ramping Negative
VOSENSE Ramping Positive
–6
6
–7.5
7.5
–9.5
9.5
%
ELECTRICAL CHARACTERISTICS The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC3728LZUH: TJ = TA + (PD 34°C/W)
Note 3: The IC is tested in a feedback loop that servos VITH1, 2 to a
specied voltage and measures the resultant VOSENSE1, 2.
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 6: The minimum on-time condition is specied for an inductor
peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time
considerations in the Applications Information section).
Note 7: The LTC3728LZE is guaranteed to meet performance specications
over the –40°C to 85°C operating temperature range as assured by design,
characterization and correlation with statistical process controls.
TYPICAL PERFORMANCE CHARACTERISTICS
Efciency vs Output Current
and Mode (Figure 13)
Efciency vs Output Current
(Figure 13)
Efciency vs Input Voltage
(Figure 13)
OUTPUT CURRENT (A)
0.001
0
EFFICIENCY
(%)
10
30
40
50
100
70
0.01
0.1
1
3728LZ G01
20
80
90
60
10
FORCED
CONTINUOUS
MODE (PWM)
CONSTANT
FREQUENCY
(BURST DISABLE)
Burst Mode
OPERATION
VIN = 15V
VOUT = 5V
f = 250kHz
OUTPUT CURRENT (A)
0.001
EFFICIENCY
(%)
70
80
10
3728LZ G02
60
50
0.01
0.1
1
100
90
VIN = 10V
VIN = 15V
VIN = 7V
VIN = 20V
VOUT = 5V
f = 250kHz
INPUT VOLTAGE (V)
5
EFFICIENCY
(%)
70
80
3728LZ G03
60
50
15
25
35
100
VOUT = 5V
IOUT = 3A
f = 250kHz
90
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| LTC3728LZEUH#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)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 |
| LTC3728LZEUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)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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