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| 型号： | LT1110CS8-12#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST 12V 0.4A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 12V |
| 输入电压： | 1 V ~ 30 V |
| 频率 - 开关： | 70kHz |
| 电流 - 输出： | 400mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1110
A PPLICATI
S I FOR ATIO
Arrangement of the gain block as a low battery detector is
straightforward. Figure 12 shows hookup. R1 and R2 need
only be low enough in value so that the bias current of the
SET input does not cause large errors. 33k ? for R2 is
adequate. R3 can be added to introduce a small amount of
hysteresis. This will cause the gain block to “snap” when
the trip point is reached. Values in the 1M-10M range are
optimal. The addition of R3 will change the trip point,
Output ripple of the LT1110, normally 90mV at 5V OUT can
be reduced significantly by placing the gain block in front
of the FB input as shown in Figure 13. This effectively
reduces the comparator hysteresis by the gain of the gain
block. Output ripple can be reduced to just a few millivolts
using this technique. Ripple reduction works with step-
down or inverting modes as well. For this technique to be
effective, output capacitor C1 must be large, so that each
however.
+5V
switching cycle increases V OUT by only a few millivolts.
1000 μ F is a good starting value.
R1
V IN
LT1110
47k
L1
D1
V OUT
V BAT
220mV
REF
SET
–
+
AO
TO
PROCESSOR
V BAT
R3
270k
I LIM V IN
AO SW1
LT1110
R2
+
C1
GND
FB
SET
( 4.33 220mV )
V LB –
μ A
( )( )
V OUT = + 1 220mV
R2
R3
R1 =
V LB = BATTERY TRIP POINT
R2 = 33k ?
R3 = 2M ?
R2
R1
GND
SW2
R1
LT1110 ? TA08
LT1110 ? TA07
Figure 12. Setting Low Battery Detector Trip Point
Table 1. Inductor Manufacturers
Figure 13. Output Ripple Reduction Using Gain Block
Table 2. Capacitor Manufacturers
MANUFACTURER
Coiltronics International
984 S.W. 13th Court
Pompano Beach, FL 33069
305-781-8900
Sumida Electric Co. USA
708-956-0666
PART NUMBERS
CTX100-4 Series
Surface Mount
CD54
CDR74
CDR105
Surface Mount
MANUFACTURER
Sanyo Video Components
2001 Sanyo Avenue
San Diego, CA 92173
619-661-6835
Nichicon America Corporation
927 East State Parkway
Schaumberg, IL 60173
708-843-7500
Sprague Electric Company
Lower Main Street
PART NUMBERS
OS-CON Series
PL Series
150D Solid Tantalums
550D Tantalex
Sanford, ME 04073
207-324-4140
Matsuo
714-969-2491
Table 3. Transistor Manufacturers
MANUFACTURER
Zetex
Commack, NY
516-543-7100
267 Series
Surface Mount
PART NUMBERS
ZTX Series
FZT Series
Surface Mount
13
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| LT1110CS8-5 | 功能描述:IC REG BUCK BOOST 5V 0.4A 8SOIC RoHS:否 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 |
| LT1110CS8-5#PBF | 功能描述:IC REG BUCK BOOST 5V 0.4A 8SOIC 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 |
| LT1110CS8-5#TR | 功能描述:IC REG BUCK BOOST 5V 0.4A 8SOIC RoHS:否 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 |
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