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參數資料
| 型號： | LTC1551 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Low Noise, Switched Capacitor Regulated Voltage Inverters() |
| 中文描述： | 低噪聲，開關電容穩(wěn)壓逆變器（） |
| 文件頁數： | 5/12頁 |
| 文件大?。?/td> | 287K |
| 代理商： | LTC1551 |
5
LTC1550/LTC1551
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Spot Noise
(See Figure 2, C
OUT
= 10
μ
F)
10
V
CC
= 5V
I
L
= 5mA
C
IN
= 4.7
μ
F
C
OUT
= 10
μ
F
C
L
μ
F
FREQUENCY (kHz)
1
0.01
N
μ
V
√
H
1
0.1
10
100
LTC1550/51 G12
Output Spectrum
(See Figure 2, C
OUT
= 22
μ
F)
FREQUENCY (Hz)
100k
N
μ
V
90
80
70
60
50
40
30
20
10
0
–10
1M
10M
LT1550/51 G13
V
CC
= 5V
I
L
= 5mA
C
IN
4.7
μ
F
C
OUT
= 22
μ
F
C
L
= 0.1
μ
F
Spot Noise
(See Figure 2, C
OUT
= 22
μ
F)
FREQUENCY (kHz)
1
0.01
N
μ
V
√
H
1
0.1
10
10
100
LTC1550/51 G14
V
CC
= 5V
I
L
= 5mA
C
IN
= 4.7
μ
F
C
OUT
= 22
μ
F
C
L
μ
F
PI
FU
CTIO
N
S
U
U
SHDN:
Shutdown (TTL Compatible). This pin is active low
(SHDN) for the LTC1550 and active high (SHDN) for the
LTC1551. When this pin is at V
CC
(GND for LTC1551), the
LTC1550 operates normally. When SHDN is pulled low
(high for LTC1551), the LTC1550 enters shutdown mode.
In shutdown, the charge pump stops, the output collapses
to 0V, and the quiescent current drops typically to 0.2
μ
A.
V
CC
:
Power Supply. V
CC
requires an input voltage between
4.5V and 6.5V for the fixed voltage LTC1550CS8-4.1/
LTC1551CS8-4.1. The adjustable voltage LTC1550CGN/
LTC1550IGN operates with a VCC range of 2.7V to 6.5V.
Output voltage and output load current conditions depend
on the VCC supply voltage. Consult the Electrical Charac-
teristics table and Typical Performance Characteristics for
guaranteed test points. The difference between the input
voltage and output should never be set to exceed 14V or
damage to the chip may occur. V
CC
must be bypassed to
PGND (GND for 8-pin packages) with at least a 0.1
μ
F
capacitor placed in close proximity to the chip. A 4.7
μ
F or
larger bypass capacitor is recommended to minimize
noise and ripple at the output.
C1
+
:
C1 Positive Input. Connect a 0.1
μ
F capacitor between
C1
+
and C1
–
.
V
OUT
:
Negative Voltage Output. This pin must be bypassed
to ground with a 4.7
μ
F or larger capacitor to ensure
regulator loop stability. At least 10
μ
F is recommended to
provide specified output ripple. An additional 0.1
μ
F low
ESR capacitor is recommended to minimize high fre-
quency spikes at the output.
C1
–
:
C1 Negative Input. Connect a 0.1
μ
F capacitor from
C1
+
to C1
–
.
GND:
Ground. Connect to a low impedance ground. A
ground plane will help minimize regulation errors.
CP
OUT
:
Negative Charge Pump Output. This pin requires a
0.1
μ
F storage capacitor to ground.
SENSE:
Connect to V
OUT
. The LTC1550/LTC1551 internal
regulator uses this pin to sense the output voltage. For
optimum regulation, SENSE should be connected close to
the output load.
SSOP PACKAGE ONLY
PGND:
Power Ground. Connect to a low impedance ground.
PGND should be connected to the same potential as
AGND.
AGND:
Analog Ground. Connect to a low impedance
ground. AGND should be connected to a ground plane to
minimize regulation errors.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC1551CS8-4.1 | 功能描述:IC REG SWITCHED CAP INV 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
| LTC1551CS8-4.1#PBF | 功能描述:IC REG SWITCHED CAP INV 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
| LTC1551CS8-4.1#TR | 功能描述:IC REG SWITCHED CAP INV 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
| LTC1551CS8-4.1#TRPBF | 功能描述:IC REG SWITCHED CAP INV 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
| LTC1551LCMS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數: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: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) 供應商設備封裝:8-SOIC |
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