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參數(shù)資料
| 型號(hào)： | LTC1779 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 250mA Low Dropout Current Mode Step-Down DC/DC Converter in SOT-23(2.5V輸出,250mA電流模式，低壓差,步降DC/DC變換器（SOT-23封裝）) |
| 中文描述： | 250mA的低壓差電流模式降壓DC / DC轉(zhuǎn)換器采用SOT - 23（2.5V的輸出，250mA的電流模式，低壓差，步降直流/直流變換器（采用SOT - 23封裝）） |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 174K |
| 代理商： | LTC1779 |
2
LTC1779
(Note 1)
Input Supply Voltage (V
IN
).........................–0.3V to 10V
SENSE
–
, SW Voltages ..................–0.3V to (V
IN
+ 0.3V)
V
FB
, I
TH
/RUN Voltages ..............................–0.3V to 2.4V
SW Peak Output Current (<10
μ
s).......................... 0.5A
Storage Ambient Temperature Range... –65
°
C to 150
°
C
Operating Temperature Range (Note 2)...–40
°
C to 85
°
C
Junction Temperature (Note 3).............................150
°
C
Lead Temperature (Soldering, 10 sec)..................300
°
C
T
JMAX
= 150
°
C,
θ
JA
= 230
°
C/W
S6 PART MARKING
ORDER PART
NUMBER
LTC1779ES6
LTLP
Consult factory for Industrial and Military grade parts.
The
G
denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 4.2V unless otherwise specified. (Note 2)
PARAMETER
Input DC Supply Current
Normal Operation
Shutdown
UVLO
Undervoltage Lockout Threshold
CONDITIONS
Typicals at V
IN
= 4.2V (Note 4)
2.5V
≤
V
IN
≤
9.8V
2.5V
≤
V
IN
≤
9.8V, V
ITH
/RUN = 0V
V
IN
< UVLO Threshold
V
IN
Falling
V
IN
Rising
MIN
TYP
MAX
UNITS
135
8
7
2.0
2.1
0.325
0.5
0.800
0.800
0
2.5
2.5
5
0.860
30
170
15
550
100
0.85
120
240
22
13
μ
A
μ
A
μ
A
V
V
V
μ
A
V
V
G
1.60
2.5
0.5
0.85
0.820
0.830
3
Shutdown Threshold (at I
TH
/RUN)
Start-Up Current Source
Regulated Feedback Voltage
G
0.15
0.25
0.780
0.770
–3
V
ITH
/RUN = 0V
(Note 5) 0
°
C to 70
°
C
(Note 5) –40
°
C to 85
°
C
2.5V
≤
V
IN
≤
9.8V (Note 5)
I
TH
/RUN Sinking 5
μ
A (Note 5)
I
TH
/RUN Sourcing 5
μ
A (Note 5)
(Note 5)
Measured at V
FB
G
G
Output Voltage Line Regulation
Output Voltage Load Regulation
mV/V
mV/
μ
A
mV/
μ
A
V
FB
Input Current
Overvoltage Protect Threshold
Overvoltage Protect Hysteresis
Overtemperature Protect Threshold
Overtemperature Protect Hysteresis
Oscillator Frequency
25
nA
V
mV
°
C
°
C
kHz
kHz
mV
0.820
0.895
V
FB
= 0.8V
V
FB
= 0V
V
IN
= 4.2V, I
SW
= 100mA
(Note 6)
500
650
R
DS(ON)
of Internal P-Channel FET
Peak Current Sense Voltage
1.4
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC1779E 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 formula:
T
J
= T
A
+ (P
D
θ
J
°
C/W)
Note 4:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5:
The LTC1779 is tested in a feedback loop that servos V
FB
to the
output of the error amplifier.
Note 6:
Peak current sense voltage is reduced dependent upon duty cycle
to a percentage of value as given in Figure 2.
I
TH
/RUN 1
GND 2
V
FB
3
6 SW
5 V
IN
4 SENSE
–
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
ABSOLUTEW
W
W
U
PACKAGE/ORDER U
U
W
ELECTRICAL CHARACTERISTICS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1779ES6#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 9.8V 6-Pin TSOT-23 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, CUT TAPE 500mA, 500kHz Step-Down Switching Regulator |
| LTC1779ES6#TR | 功能描述:IC REG BUCK ADJ 0.25A SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LTC1779ES6#TRM | 功能描述:IC REG BUCK ADJ 0.25A SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LTC1779ES6#TRMPBF | 功能描述:IC REG BUCK ADJ 0.25A SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色產(chǎn)品:BD91x Series Step-Down Regulators 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):2 輸出電壓:3.3V，0.8 V ~ 2.5 V 輸入電壓:4.5 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關(guān):1MHz 電流 - 輸出:1.5A 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:VQFN020V4040 產(chǎn)品目錄頁(yè)面:1373 (CN2011-ZH PDF) 其它名稱:BD9152MUV-E2TR |
| LTC1779ES6#TRPBF | 功能描述:IC REG BUCK ADJ 0.25A SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
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