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參數(shù)資料
| 型號： | LTC1430AC |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 隔離反激式開關穩(wěn)壓9V輸出 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 356K |
| 代理商： | LTC1430AC |
1
LTC1430A
High Power Step-Down
Switching Regulator Controller
S
FEATURE
D
The LTC
1430A is a high power, high efficiency switching
regulator controller optimized for 5V to 1.xV-3.xV applica-
tions. It includes a precision internal reference and an
internal feedback system that can provide output regula-
tion of
±
1% over temperature, load current and line voltage
shifts. The LTC1430A uses a synchronous switching archi-
tecture with two N-channel output devices, eliminating the
need for a high power, high cost P-channel device. Addi-
tionally, it senses output current across the drain-source
resistance of the upper N-channel FET, providing an
adjustable current limit without an external low value sense
resistor.
The LTC1430A includes a fixed frequency PWM oscillator
for low output ripple under virtually all operating condi-
tions. The 200kHz free-running clock frequency can be
externally adjusted from 100kHz to above 500kHz. The
LTC1430A’s maximum duty cycle is typically 93.5% com-
pared to 88% for the LTC1430. This permits 3.3V to 2.xV
conversion using a low power 5V supply. The LTC1430A
features low 350
μ
A quiescent current, allowing greater
than 90% efficiency operation in converter designs from
1A to greater than 50A output current. Shutdown mode
drops the LTC1430A supply current to 1
μ
A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
AMD-K6 is a registered trademark of Advanced Micro Devices, Inc.
U
ESCRIPTIO
I
High Power 5V to 1.xV-3.xV Switching Controller:
Can Exceed 10A Output
I
Maximum Duty Cycle > 90% Permits 3.3V to 2.xV
Conversion Using a Low Power 5V Supply
I
All N-Channel External MOSFETs
I
Fixed Frequency Operation—Small L
I
Excellent Output Regulation:
±
1% Over Line, Load
and Temperature Variations
I
High Efficiency: Over 95% Possible
I
No Low Value Sense Resistor Needed
I
Outputs Can Drive External FETs with Up to
10,000pF Gate Capacitance
I
Quiescent Current: 350
μ
A Typ, 1
μ
A in Shutdown
I
Fast Transient Response
I
Adjustable or Fixed 3.3V Output
I
Available in 8-Lead SO and 16-Lead GN
and SO Packages
U
A
O
PPLICATI
TYPICAL
Efficiency
Typical 5V to 3.3V, 10A Application
+
C
IN
220
μ
F
×
4
C
OUT
330
μ
F
×
6
+
+
+
2.7
μ
H/15A
PV
CC1
V
CC
SS
FREQSET
SHDN
COMP
PV
CC2
PGND
GND
G1
I
FB
I
MAX
G2
NC
1430 TA01
SHUTDOWN
FB
NC
Q1A, Q1B, Q2: MOTOROLA MTD20N03HL
C
IN
: AVX-TPSE227M010R0100
C
OUT
: AVX-TPSE337M006R0100
SENSE
+
LTC1430A
SENSE
–
16k
100
R
C
7.5k
C
4700pF
C1
220pF
MBR0530T1
1k
0.1
μ
F
1
μ
F
0.01
μ
F
0.1
μ
F
4.7
μ
F
0.1
μ
F
3.3V
10A
Q1A, Q1B
2 IN PARALLEL
Q2
5V
LOAD CURRENT (A)
40
70
100
90
80
50
60
E
10
1430 TA02
0.1
1
T
A
= 25
°
C
PV
CC
= 5V
V
OUT
= 3.3V
U
S
A
O
PPLICATI
I
Power Supply for Pentium
II and AMD-K6
Microprocessors
I
High Power 5V to 3.xV Regulators
I
Local Regulation for Dual Voltage Logic Boards
I
Low Voltage, High Current Battery Regulation
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| LTC1430ACGN | 功能描述:IC SW REG CNTRLR STEP-DWN 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LTC1430ACGN#PBF | 功能描述:IC SW REG CNTRLR STEP-DWN 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LTC1430ACGN#TR | 功能描述:IC REG SW STEPDOWN 5V HP 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LTC1430ACGN#TRPBF | 功能描述:IC SW REG CNTRLR STEP-DWN 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LTC1430ACS | 功能描述:IC SW REG CNTRLR STEP-DWN 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
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