参数资料
| 型号： | LT1306ES8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST 5V 1A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 1.8 V ~ 7 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 310kHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°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 |
LT1306
Synchronous, Fixed Frequency
Step-Up DC/DC Converter
FEATURES
DESCRIPTIO
s
s
s
s
s
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s
Output Disconnected from Input During Shutdown
Output Voltage Remains Regulated
When V IN > V OUT
Controlled Input Current During Start-Up
300kHz Current Mode PWM Operation
Can Be Externally Synchronized
Internal 2A Switches
Operates with V IN as Low as 1.8V
Automatic Burst Mode Operation at Light Loads
Quiescent Current: 160 μ A
Shutdown Current: 9 μ A Typ
The LT ? 1306 is a fully integrated, fixed frequency syn-
chronous boost converter capable of generating 5V at 1A
from a Li-Ion cell. The device contains both the main
power switch and synchronous rectifier on chip and
automatically disconnects the output from the input in
shutdown, eliminating the need for external load discon-
nect circuitry. Additionally, the output remains regulated
when V IN exceeds V OUT , allowing difficult step-up/step-
down converter functions to be easily realized using a
single inductor.
The internal 300kHz oscillator of the LT1306 can be easily
synchronized to an external clock from 425kHz to 500kHz.
Satellite Phones
Portable Instruments
Personal Digital Assistants
Palmtop Computers
APPLICATIO S
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, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO N
D1
This allows switching harmonics to be tightly controlled
and eliminates any beat frequencies that may result from
a multifrequency system. The LT1306 automatically shifts
into power saving Burst Mode TM operation at light loads.
At heavy loads the LT1306 operates in fixed frequency
current mode. No-load quiescent current is 160 μ A and
reduces to 9 μ A in shutdown mode.
The LT1306 is available in an SO-8 package.
Efficiency
1-CELL
Li-Ion
L1
10 μ H
C1
1 μ F
90
85
V IN = 4.2V
+
C IN1
22 μ F
V IN
S/S
C IN2
0.1 μ F
V C
R3
118k
C Z
68nF
SW CAP
OUT
LT1306
FB
GND
C P
68pF
R1
768k
R2
249k
+
C O1
220 μ F
5V
1A
C O2
1 μ F
C IN1 : AVX TAJC226M010
C O1 : AVX TPSE227M010R0100
C IN1 , C O2 : CERAMIC
C1: AVX TAJA105K020
80
75
70
65
60
1
V O = 5V
L1 = 10 μ H
(FIGURE 1)
V IN = 3.6V
V IN = 2.6V
10 100
1000
1306 F01
D1: MMBD914LT1
L1: CTX10-2
LOAD CURRENT (mA)
1306 TA01
Figure 1. Single Li-Ion Cell to 5V Converter
1
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