参数资料
型号: LTC1704BEGN#TR
厂商: Linear Technology
文件页数: 8/28页
文件大小: 347K
描述: IC REG DL BUCK/LINEAR 16-SSOP
标准包装: 2,500
拓扑: 降压(降压)(1),线性(LDO)(1)
功能: 任何功能
输出数: 2
频率 - 开关: 550kHz
电压/电流 - 输出 1: 控制器
电压/电流 - 输出 2: 控制器
带 LED 驱动器:
带监控器:
带序列发生器:
电源电压: 3.15 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-SSOP
包装: 带卷 (TR)
LTC1704/LTC1704B
8
1704bfa
PI FU CTIO S
U
U
compensation and soft-start connections should return to
GND. GND and PGND should connect only at a single
point, near the PGND pin and the negative plate of the V
IN
bypass capacitor.
REGFB (Pin 9): Linear Regulator Controller Feedback
Input. REGFB should be connected through a resistor
divider network to V
OUTREG
 to set the output voltage of the
linear regulator.
REGILM (Pin 10): Linear Regulator Controller Current
Limit Setting cum ON/OFF Control. This pin is internally
servoed to 0.8V. An external resistor R
REGILM
 between V
CC
and REGILM programs the REGILM pin input current. This
current determines the maximum pass transistor base
current and directly controls the linear regulator current
sourcing capabilitiy. An external capacitor, C
DELAY
 is added
to this pin to control the turn-on time of the linear regula-
tor, the minimum value for this capacitor is 100pF. Refer
to the Linear Regulator Current Limit Programming sec-
tion for more information on choosing R
REGILM
 and C
DELAY
.
Pulling REGILM to GND turns off the linear regulator. If
both RUN/SS and REGILM are pulled low, the LTC1704
enters shutdown mode.
V
CC
 (Pin 11): Power Supply Input. All internal circuits
except the switcher output drivers are powered from this
pin. V
CC
 should be connected to a low noise 5V supply, and
should be bypassed to GND with at least a 10礔 capacitor
in close proximity to the LTC1704.
PGOOD (Pin 12): Power Good. PGOOD is an open-drain
logic output. PGOOD pulls low if any of the two supply
outputs are outside ?0% of their nominal levels. An
external pull-up resistor is required at PGOOD to allow it
to swing positive.
PGND (Pin 13): Power Ground. The BG driver returns to
this pin. Connect PGND to a high current ground node in
close proximity to the sources of external MOSFET QB,
and the V
IN
 and V
OUTSW
 bypass capacitors.
BG (Pin 14): Switcher Controller Bottom Gate Drive. The
BG pin drives the gate of the bottom N-channel synchro-
nous switch MOSFET, QB. BG is designed to typically drive
up to 10,000pF of gate capacitance.
PV
CC
 (Pin 15): Switcher Controller Bottom Gate Driver Sup-
ply. PV
CC
 provides power to the BG output driver. PV
CC
must be connected to a voltage high enough to fully turn
on the external MOSFET, QB. PV
CC
should generally be con-
nected directly to V
IN
, the main system 5V supply. PV
CC
requires at least a 10礔 bypass capacitor directly to PGND.
BOOST (Pin 16): Switcher Controller Top Gate Driver
Supply. The BOOST pin supplies power to the floating TG
driver. Bypass BOOST to SW with a 1礔 capacitor. An
external Schottky diode from V
IN
 to BOOST creates a
complete floating charge-pumped supply at BOOST. No
other external supplies are required.
TEST CIRCUIT
TG
SW
I
MAX
RUN/SS
COMP
FB
REGDR
GND
BOOST
PV
CC
BG
PGND
PGOOD
V
CC
REGILM
REGFB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1704
2000pF
80k
R
REGILM
100k
10礔
5V
I
BOOST
+
100pF
1704 TC
I
PVCC
I
VCC
250k
100&
V
FB
f
OSC
2k
1礔
2000pF
相关PDF资料
PDF描述
GSM08DRSI-S288 CONN EDGECARD 16POS .156 EXTEND
GBM22DSXH CONN EDGECARD 44POS DIP .156 SLD
ADE7753ARSZRL IC ENERGY METERING 1PHASE 20SSOP
M7VXK-1506J D-SUB CABLE - MMU15K/MC16G/X
MBR6045WTG DIODE SCHOTTKY 45V 30A TO247
相关代理商/技术参数
参数描述
LTC1704EGN 功能描述:IC REG DL BUCK/LINEAR 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LTC1704EGN#PBF 功能描述:IC REG DL BUCK/LINEAR 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LTC1704EGN#TR 功能描述:IC REG DL BUCK/LINEAR 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LTC1704EGN#TRPBF 功能描述:IC REG DL BUCK/LINEAR 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压(降压)同步(3),线性(LDO)(2) 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LTC1705EGN 功能描述:IC PWR SUPPLY CONTROLLER 28SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器,监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP(5x5) 包装:带卷 (TR)