參數(shù)資料
型號(hào)： LTC1626
廠商： Linear Technology Corporation
英文描述： Low Voltage, High Efficiency Step-Down DC/DC Converter(低壓，高效率，步降DC/DC變換器)
中文描述： 低，高效率步電壓型DC / DC轉(zhuǎn)換器（低壓，高效率，步降直流/直流變換器）
文件頁(yè)數(shù)： 2/12頁(yè)
文件大?。?/td> 242K
代理商： LTC1626
2
LTC1626
ABSOLUTE
AXI
U
RATIU
W
(Voltages Referred to GND Pin)
Input Supply Voltage (Pins 1, 2, 13)............–0.3V to 7V
Shutdown Input Voltage (Pin 10) ................–0.3V to 7V
Sense
–
, Sense
+
(Pins 7, 8)........... –0.3V to (V
IN
+ 0.3V)
LBO, LBI (Pins 3, 4).................................... –0.3V to 7V
C
T
, I
TH
, V
FB
(Pins 5, 6, 9)............. –0.3V to (V
IN
+ 0.3V)
DC Switch Current (Pin 14) .................................... 1.2A
Peak Switch Current (Pin 14) ................................. 1.6A
Switch Voltage (Pin 14) .......(V
IN
– 7.5V) to (V
IN
+ 0.3V)
Operating Temperature Range.....................0
°
C to 70
°
C
Extended Commercial Operating
Temperature Range (Note 4) ............. –40
°
C to 85
°
C
Junction Temperature (Note 1).............................125
°
C
Storage Temperature Range ................. –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)..................300
°
C
W
W
PACKAGE/ORDER I
FOR
ATIO
W
U
U
Consult factory for Industrial and Military grade parts.
ORDER PART
NUMBER
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
T
JMAX
= 125
°
C,
θ
JA
= 110
°
C/W
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PWR V
IN
V
IN
LBO
LBI
C
T
I
TH
SENSE
–
SW
PWR V
IN
PGND
SGND
SHDN
V
FB
SENSE
+
LTC1626CS
ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
IN
= 4.5V, V
OUT
= 2.5V, V
SHDN
= 0V, unless otherwise specified.
SYMBOL
I
FB
V
FB
PARAMETER
Feedback Pin Current
Feedback Voltage
CONDITIONS
MIN
TYP
0.1
1.25
MAX
1
1.28
1.3
40
50
UNITS
μ
A
V
V
mV
mV
0
°
C to 70
°
C
–40
°
C to 85
°
C
V
IN
= 3.5V to 5.5V, I
LOAD
= 250mA
10mA
≤
I
LOAD
≤
250mA
I
LOAD
= 0
G
G
1.22
1.2
–40
V
OUT
Output Voltage Line Regulation
Output Voltage Load Regulation
Burst Mode Output Ripple
Input DC Supply Current (Note 2)
Active Mode
Sleep Mode
Shutdown
Low-Battery Trip Point
Low-Battery Input Bias Current
Low-Battery Output Sink Current
Current Sense Threshold Voltage
V
SENSE+
– V
SENSE–
ON Resistance of Switch
Switch Off-Time (Note 3)
SHDN Pin High
SHDN Pin Low
SHDN Pin Input Current
0
25
50
mV
P-P
I
Q
G
G
1.9
165
0.5
1.25
3.0
300
5
1.35
±
0.5
mA
μ
A
μ
A
V
SHDN
= V
IN
V
LBTRIP
I
LBI
I
LBO
V
SENSE
1.15
V
μ
A
mA
mV
mV
μ
s
V
LBO
= 0.4V
V
SENSE–
= 2.5V, V
FB
= V
OUT
/2 + 25mV (Forced)
V
SENSE–
= 2.5V, V
FB
= V
OUT
/2 – 25mV (Forced)
0.4
1.4
25
155
0.32
5
130
180
0.45
6
R
ON
t
OFF
V
IHSD
V
ILSD
I
INSD
C
T
= 390pF, I
LOAD
= 400mA
Minimum Voltage for Device to Be Shut Down
Maximum Voltage for Device to Be Active
0V
≤
V
SHDN
≤
7V
4
V
IN
– 0.4
V
V
0.4
±
1
G
μ
A
The
G
denotes specifications that apply over the specified operating
temperature range.
Note 1:
T
J
is calculated from the ambient temperature T
A
and power
dissipation according to the following formula:
T
J
= T
A
+ (P
D
110
°
C/W)
Note 2:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 3:
In applications where R
SENSE
is placed at ground potential, the
off-time increases by approximately 40%.
Note 4:
C grade device specifications are guaranteed over the 0
°
C to 70
°
C
temperature range. In addition, C grade device specifications are assured
over the –40
°
C to 85
°
C temperature range by design or correlation, but
are not production tested.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1626CS 制造商:Linear Technology 功能描述:Low Volt Hi Eff Stepdn DC/DC Conv.
LTC1627CS8 功能描述:IC REG BUCK SYNC ADJ 0.5A 8SOIC 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 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
LTC1627CS8#PBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 8SOIC 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:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 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:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LTC1627CS8#TR 功能描述:IC REG BUCK SYNC ADJ 0.5A 8SOIC 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 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
LTC1627CS8#TRPBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 8SOIC 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 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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