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参数资料
| 型号： | ADP1613-BL3-EVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | EVAL BLANK ADISIMPOWER ADP1613 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 稳压器拓扑结构： | 升压 |
| 板类型： | 裸（未填充） |
| 已供物品： | 裸板 |
| 已用 IC / 零件： | ADP1613 |
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Data Sheet
THEORY OF OPERATION
V IN
C IN
>1.6V
L1
ADP1612/ADP1613
VIN
6
<0.3V
7
FREQ
V IN
D
COMPARATOR
+
+
A
CURRENT
5
SW
D1
C OUT
V OUT
V OUT
ERROR
PWM
COMPARATOR
D REF
SENSING
R1
FB
2
AMPLIFIER
OSCILLATOR
R2
V BG
UVLO
5μA
R COMP
COMP
1
V IN
UVLO REF
COMPARATOR
S
R
Q
DRIVER
N1
C COMP
V SS
5μA
T SENSE
TSD
COMPARATOR
SS
8
SOFT
START
T REF
RESET
BG
BAND GAP
C SS
AGND
1.1M?
AGND
ADP1612/AD1613
EN
3
>1.6V
4
GND
<0.3V
Figure 34. Block Diagram with Step-Up Regulator Application Circuit
The ADP1612/ADP1613 current-mode step-up switching
converters boost a 1.8 V to 5.5 V input voltage to an output
voltage as high as 20 V. The internal switch allows a high
output current, and the high 650 kHz/1.3 MHz switching
frequency allows for the use of tiny external components.
The switch current is monitored on a pulse-by-pulse basis to
limit it to 1.4 A typical (ADP1612) or 2.0 A typical (ADP1613).
CURRENT-MODE PWM OPERATION
The ADP1612/ADP1613 utilize a current-mode PWM control
scheme to regulate the output voltage over all load conditions.
The output voltage is monitored at FB through a resistive voltage
divider. The voltage at FB is compared to the internal 1.235 V
reference by the internal transconductance error amplifier to
create an error voltage at COMP. The switch current is internally
measured and added to the stabilizing ramp. The resulting sum
is compared to the error voltage at COMP to control the PWM
modulator. This current-mode regulation system allows fast
transient response, while maintaining a stable output voltage.
By selecting the proper resistor-capacitor network from COMP
to GND, the regulator response is optimized for a wide range of
input voltages, output voltages, and load conditions.
FREQUENCY SELECTION
The frequency of the ADP1612/ADP1613 is pin-selectable
to operate at either 650 kHz to optimize the regulator for high
efficiency or at 1.3 MHz for use with small external components.
If FREQ is left floating, the part defaults to 650 kHz. Connect
FREQ to GND for 650 kHz operation or connect FREQ to VIN
for 1.3 MHz operation. When connected to VIN for 1.3 MHz
operation, an additional 5 μA, typical, of quiescent current is
active. This current is turned off when the part is shutdown.
SOFT START
To prevent input inrush current to the converter when the part is
enabled, connect a capacitor from SS to GND to set the soft start
period. Once the ADP1612/ADP1613 are turned on, SS sources
5 μA, typical, to the soft start capacitor (C SS ) until it reaches
1.2 V at startup. As the soft start capacitor charges, it limits the
peak current allowed by the part. By slowly charging the soft
start capacitor, the input current ramps slowly to prevent it
from overshooting excessively at startup. When the ADP1612/
ADP1613 are in shutdown mode (EN ≤ 0.3 V), a thermal shut-
down event occurs, or the input voltage is below the falling
undervoltage lockout voltage, SS is internally shorted to GND
to discharge the soft start capacitor.
Rev. D | Page 11 of 28
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| ADP1614 | 制造商:AD 制造商全称:Analog Devices 功能描述:650 kHz/1.3 MHz, 4 A, Step-Up |
| ADP1614-1.3-EVALZ | 功能描述:电源管理IC开发工具 Eval Board 1.3 MHz Switching Freq RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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| ADP1614ACPZ-1.3-R7 | 功能描述:IC REG BOOST ADJ 4A 10LFCSP 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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