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参数资料
| 型号： | LTC3568IDD |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件页数： | 7/18页 |
| 文件大小： | 300K |
| 代理商： | LTC3568IDD |
LTC3568
3568fa
applicaTions inForMaTion
1. Does the capacitor CIN connect to the power VIN
(Pin 6) and power GND (Pin 5) as close as possible?
This capacitor provides the AC current to the internal
power MOSFETs and their drivers.
2. Are the COUT and L1 closely connected? The (–) plate
of COUT returns current to PGND and the (–) plate
of CIN.
3. The resistor divider, R1 and R2, must be connected
between the (+) plate of COUT and a ground line ter-
minated near SGND (Pin 3). The feedback signal VFB
should be routed away from noisy components and
traces, such as the SW line (Pin 4), and its trace should
be minimized.
4. Keep sensitive components away from the SW pin. The
input capacitor CIN, the compensation capacitor CC and
CITH and all the resistors R1, R2, RT, and RC should be
routed away from the SW trace and the inductor L1.
5. A ground plane is preferred, but if not available, keep
the signal and power grounds segregated with small
signal components returning to the SGND pin at one
point which is then connected to the PGND pin.
6. Flood all unused areas on all layers with copper. Flood-
ing with copper will reduce the temperature rise of
power components. These copper areas should be
connected to one of the input supplies: PVIN, PGND,
SVIN or SGND.
SVIN
LTC3568
PGOOD
SW
PVIN
SYNC/MODE
VFB
ITH
SHDN/RT
SGND
L1
2H
VIN
2.5V TO
5.5V
VOUT
1.8V/2.5V/3.3V
AT 1.8A
R5
100k
R4
324k
R1A
280k
R3
13k
RS1
1M
BM
RS2
1M
3568 F07a
C3
1000pF
C4 22pF
R2 887K
C2
22F
x2
SGND
R1B
412k
R1C
698k
PS
FC
PGND
C1
22F
PGND
SGND
NOTE: IN DROPOUT, THE OUTPUT TRACKS THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A915AY-2ROM (D53LC SERIES)
GND
3.3V
2.5V
1.8V
LOAD CURRENT (mA)
EFFICIENCY
(%)
100
95
90
85
80
75
70
1
100
1000
10000
3568 F07b
10
VIN = 3.3V
VOUT = 2.5V
CIRCUIT OF FIGURE 7
Burst Mode
OPERATION
PULSE SKIP
FORCED CONTINUOUS
Figure7.GeneralPurposeBuckRegulatorUsingCeramicCapacitors
EfficiencyvsLoadCurrent
Typical applicaTions
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| LTC3568IDD#TR | 4 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO10 |
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相关代理商/技术参数 |
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| LTC3568IDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.8A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3568IDD#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic 4MHz 1.8A Synch St 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, 4MHz, 1.8A Synch St |
| LTC3568IDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.8A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3569 | 制造商:LINER 制造商全称:Linear Technology 功能描述:7-Channel Confi gurable High Power PMIC |
| LTC3569EFE | 制造商:Linear Technology 功能描述:DC/DC Converter Chip |
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