參數(shù)資料
型號(hào)： LTC1772B
廠商： Linear Technology Corporation
英文描述： Constant Frequency Current Mode Step-Down DC/DC Controller in SOT-23
中文描述： 恒定頻率電流模式降壓DC / DC控制器，采用SOT - 23
文件頁(yè)數(shù)： 2/12頁(yè)
文件大小： 196K
代理商： LTC1772B
2
LTC1772B
PARAMETER
Input DC Supply Current
Normal Operation
Shutdown
UVLO
Undervoltage Lockout Threshold
CONDITIONS
Typicals at V
IN
= 4.2V (Note 4)
2.4V
≤
V
IN
≤
9.8V, PGATE Logic High
2.4V
≤
V
IN
≤
9.8V, V
ITH
/RUN = 0V
V
IN
< UVLO Threshold
V
IN
Falling
V
IN
Rising
MIN
TYP
MAX
UNITS
270
8
6
2.00
2.10
0.35
0.5
0.800
0.800
0.05
2.5
2.5
10
0.860
20
550
120
40
40
105
420
22
10
2.35
2.40
0.55
0.85
0.820
0.830
μ
A
μ
A
μ
A
V
V
V
μ
A
V
V
G
1.55
1.85
0.15
0.25
0.780
0.770
Shutdown Threshold (at I
TH
/RUN)
Start-Up Current Source
Regulated Feedback Voltage
G
V
ITH
/RUN = 0V
0
°
C to 70
°
C (Note 5)
–40
°
C to 85
°
C (Note 5)
2.4V
≤
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
Oscillator Frequency
50
nA
V
mV
kHz
kHz
ns
ns
mV
0.820
0.895
V
FB
= 0.8V
V
FB
= 0V
C
LOAD
= 3000pF
C
LOAD
= 3000pF
(Note 6)
500
650
Gate Drive Rise Time
Gate Drive Fall Time
Peak Current Sense Voltage
ABSOLUTE
AXI
U
RATIU
W
(Note 1)
Input Supply Voltage (V
IN
).........................–0.3V to 10V
SENSE
–
, PGATE Voltages.............–0.3V to (V
IN
+ 0.3V)
V
FB
, I
TH
/RUN Voltages ..............................–0.3V to 2.4V
PGATE Peak Output Current (<10
μ
s) ....................... 1A
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
W
W
PACKAGE/ORDER I
FOR
ATIO
W
U
U
T
JMAX
= 150
°
C,
θ
JA
= 230
°
C/W
S6 PART MARKING
ORDER PART
NUMBER
LTC1772BES6
LTVU
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 4.2V unless otherwise specified. (Note 2)
The
G
denotes specifications that apply over the full operating temperature
I
TH
/RUN 1
GND 2
V
FB
3
6 PGATE
5 V
IN
4 SENSE
–
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC SOT-23
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC1772BE is guaranteed to meet specifications from0
°
Cto
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
JA
°
C/W)
Note 4:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5:
The LTC1772B 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 on duty cycle to
a percentage of value as given in Figure 2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1772BES6 制造商:Linear Technology 功能描述:IC CTRLR DC/DC S-DWN SOT23-6
LTC1772BES6#PBF 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 2.5V to 9.8V Input 6-Pin TSOT-23 制造商:Linear Technology 功能描述:DC-DC CONTROLLER BUCK 5A TS 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BUCK, 5A, TSOT-23-6; Primary Input Voltage:9.8V; No. of Outputs:1; Output Current:5A; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-TSOT-23; Supply Voltage Max:9.8V;RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BUCK, 5A, TSOT-23-6; Primary Input Voltage:9.8V; No. of Outputs:1; Output Current:5A; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-TSOT-23 ;RoHS Compliant: Yes
LTC1772BES6#TR 功能描述:IC REG CTRLR BUCK PWM CM SOT23-6 RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
LTC1772BES6#TRM 功能描述:IC REG CTRLR BUCK PWM CM SOT23-6 RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
LTC1772BES6#TRMPBF 功能描述:IC REG CTRLR BUCK PWM CM SOT23-6 RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤(pán) 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱(chēng):LM3754SQDKR
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