参数资料
型号: LT3015EDD-2.5#PBF
厂商: Linear Technology
文件页数: 15/26页
文件大小: 0K
描述: IC REG LDO -2.5V 1.5A 8-DFN
产品培训模块: LT3015 1.5A Low Noise Negative LDO
标准包装: 121
稳压器拓扑结构: 负,固定式
输出电压: -2.5V
输入电压: 可下调至 -30V
电压 - 压降(标准): 0.31V @ 1.5A
稳压器数量: 1
电流 - 输出: 1.5A
电流 - 限制(最小): 1.7A
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
供应商设备封装: 8-DFN(3x3)
包装: 管件
LT3015 Series
BLOCK DIAGRAM
SENSE
*SEE TABLE 1 FOR
NOMINAL VALUES
OF R1 AND R2
R2*
ADJ
OUT
SHDN
1.21V
–1.20V
_
+
+
R1*
BIAS CIRCUITRY
V REF
ERROR AMP
+
I LIMIT AMP
NPN DRIVER
V TH
+
QPOWER
R SNS
GND
IN
ADJ PIN BIAS CURRENT
COMPENSATION
I LIMIT FOLDBACK
3015 BD
APPLICATIONS INFORMATION
C IN R1
? + ( I ADJ ) ( R2 )
= –1.22V ? 1 +
V OUT
The LT3015 series are 1.5A negative low dropout linear
regulators featuring precision current limit and precision
bi-directional shutdown. The device supplies up to 1.5A
of output load current at a typical dropout voltage of
310mV. Moreover, the low 1.1mA operating quiescent
current drops to less than 1μA in shutdown. In addition
to low quiescent current, the LT3015 incorporates several
protection features that make it ideal for battery powered
applications. In dual supply applications where the regu-
lator’s load is returned to a positive supply, OUT can be
pulled above GND by 30V and still allow the LT3015 to
start up and operate.
V IN
GND
LT3015
SHDN ADJ
R2
IN OUT
3015 F02
? R2 ?
? R1 ?
V ADJ = –1.22V AND I ADJ = 30nA AT 25 ° C
OUTPUT RANGE = –1.22 TO – 29.5V
Figure 2. Adjustable Operation
C OUT
V OUT
Adjustable Operation
The LT3015 adjustable version has an output voltage
range of –1.22V to –29.3V. Output voltage is set by the
ratio of two external resistors as shown in Figure 2. The
device regulates the output to maintain the ADJ pin voltage
to –1.22V referred to ground. The current in R1 equals
–1.22V/R1 and the current in R2 equals the current in R1
plus the ADJ pin bias current. The ADJ pin bias current,
30nA at 25°C, flows into the ADJ pin. Calculate the output
voltage using the formula shown in Figure 1. The value
of R1 should be less than 50k to minimize errors in the
output voltage created by the ADJ pin bias current. Note
that in shutdown, the output is off and the divider current
is zero. Curves of ADJ Pin Voltage vs Temperature, ADJ
Pin Bias Current vs Temperature and ADJ Pin Bias Cur-
rent vs Input Voltage appear in the Typical Performance
Characteristics section.
The adjustable device is tested and specified with the
ADJ pin tied to the OUT pin for a –1.22V output voltage.
Specifications for output voltages greater than –1.22V are
proportional to the ratio of the desired V OUT to –1.22V
(V OUT /–1.22V). For example, load regulation for an out-
put current change of –1mA to –1.5A is typically 2mV at
V OUT = –1.22V. At V OUT = –5V, load regulation equals:
  (–5V/–1.22V) ? (2mV) = 8.2mV
3015fb
15
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LT3015EDD-3#PBF 功能描述:IC REG LDO -3V 1.5A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正,固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降(标准):0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制(最小):300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘,6-TMLF? 供应商设备封装:6-TMLF?(1.6x1.6) 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6
LT3015EDD-3#TRPBF 功能描述:IC REG LDO -3V 1.5A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正,固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降(标准):0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制(最小):300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘,6-TMLF? 供应商设备封装:6-TMLF?(1.6x1.6) 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6
LT3015EDD-3.3#PBF 功能描述:IC REG LDO -3.3V 1.5A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正,固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降(标准):0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制(最小):300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘,6-TMLF? 供应商设备封装:6-TMLF?(1.6x1.6) 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6
LT3015EDD-3.3#TRPBF 功能描述:IC REG LDO -3.3V 1.5A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正,固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降(标准):0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制(最小):300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘,6-TMLF? 供应商设备封装:6-TMLF?(1.6x1.6) 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6
LT3015EDD-5#PBF 功能描述:IC REG LDO -5V 1.5A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正,固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降(标准):0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制(最小):300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘,6-TMLF? 供应商设备封装:6-TMLF?(1.6x1.6) 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6