LP2985A-12YEQR
更新时间:2024-09-18 05:39:08
品牌:TI
描述:150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V
LP2985A-12YEQR 概述
150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V 150 mA的低噪声,具有关断功能用于输出电压\u003c 2.3V低压差稳压器 线性稳压器IC
LP2985A-12YEQR 规格参数
生命周期: | Obsolete | 零件包装代码: | BGA |
包装说明: | WCSP-5 | 针数: | 5 |
Reach Compliance Code: | unknown | ECCN代码: | EAR99 |
HTS代码: | 8542.39.00.01 | 风险等级: | 5.62 |
Is Samacsys: | N | 最大回动电压 1: | 0.6 V |
最大输入电压: | 16 V | 最小输入电压: | 2.2 V |
JESD-30 代码: | R-PBGA-B5 | 长度: | 1.312 mm |
功能数量: | 1 | 端子数量: | 5 |
工作温度TJ-Max: | 125 °C | 工作温度TJ-Min: | -40 °C |
最大输出电流 1: | 0.15 A | 最大输出电压 1: | 1.2938 V |
最小输出电压 1: | 1.2063 V | 标称输出电压 1: | 1.25 V |
封装主体材料: | PLASTIC/EPOXY | 封装代码: | VFBGA |
封装形状: | RECTANGULAR | 封装形式: | GRID ARRAY, VERY THIN PROFILE, FINE PITCH |
认证状态: | Not Qualified | 调节器类型: | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
座面最大高度: | 0.625 mm | 表面贴装: | YES |
端子形式: | BALL | 端子节距: | 0.5 mm |
端子位置: | BOTTOM | 宽度: | 1.012 mm |
Base Number Matches: | 1 |
LP2985A-12YEQR 数据手册
通过下载LP2985A-12YEQR数据手册来全面了解它。这个PDF文档包含了所有必要的细节,如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
DBV (SOT-23) PACKAGE
(TOP VIEW)
D
D
D
D
D
D
D
Available in the Texas Instruments
NanoStar and NanoFree Wafer Chip
Scale Packages
V
GND
ON/OFF
V
OUT
1
2
3
5
4
IN
Output Tolerance of:
− 1% (A Grade)
− 1.5% (Standard Grade)
BYPASS
Ultra Low Dropout, Typically
280 mV at Full Load of 150 mA
YEQ, YEU, YZQ, OR YZU (WCSP) PACKAGE
(TOP VIEW)
Wide V Range . . . 16 V (Max)
IN
Low I . . . 850 µA at Full Load at 150 mA
Q
C3
C1
V
V
OUT
IN
Shutdown Current . . . 0.01 µA Typ
Low Noise . . . 30 µV
Capacitor
With 10-nF Bypass
RMS
BYPASS
GND
B2
D
Stable With Low ESR Capacitors, Including
Ceramic
A1
ON/OFF
A3
D
D
D
Over-Current and Thermal Protection
High Peak Current Capability
For V
Options . 2.5 V, See LP2985 Data
OUT
Sheet
D
Portable Applications
− Cellular Phones
− Palmtop and Laptop Computers
− Personal Digital Assistants (PDAs)
− Digital Cameras and Camcorders
− CD Players
− MP3 Players
description/ordering information
The LP2985LV family of fixed-output, low-dropout regulators offers exceptional, cost-effective performance for
both portable and nonportable applications. Available in voltages of 1.25 V, 1.35 V, 1.5 V, 1.7 V, 1.8 V, and
2 V, the family has an output tolerance of 1% for the A version (1.5% for the non-A version), and is capable of
delivering 150-mA continuous load current. Standard regulator features, such as over-current and
over-temperature protection, are included.
The LP2985LV has a host of features that makes the regulator an ideal candidate for a variety of portable
applications:
• Low dropout: A PNP pass element allows a typical dropout of 280 mV at 150-mA load current.
• Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are
considerably lower than those associated with traditional lateral PNP regulators.
• Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 µA when the
ON/OFF pin is pulled low.
• Low-ESR-capacitor friendly: The regulator is stable with low ESR capacitors, allowing for the use of
small, inexpensive ceramic capacitors in cost-sensitive applications.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
NanoStar and NanoFree are trademarks of Texas Instruments.
ꢁ
ꢁ
ꢔ
ꢌ
ꢫ
ꢓ
ꢦ
ꢕ
ꢜ
ꢤ
ꢖ
ꢥ
ꢏ
ꢠ
ꢌ
ꢞ
ꢎ
ꢟ
ꢓ
ꢋ
ꢖ
ꢋ
ꢝ
ꢞ
ꢧ
ꢟ
ꢠ
ꢥ
ꢡ
ꢊ
ꢢ
ꢢ
ꢣ
ꢣ
ꢝ
ꢝ
ꢠ
ꢠ
ꢞ
ꢞ
ꢝ
ꢤ
ꢤ
ꢨ
ꢥ
ꢦ
ꢡ
ꢡ
ꢧ
ꢧ
ꢞ
ꢣ
ꢢ
ꢊ
ꢤ
ꢤ
ꢠ
ꢟ
ꢨ
ꢖꢧ
ꢦ
ꢩ
ꢤ
ꢪ
ꢝ
ꢥ
ꢢ
ꢤ
ꢣ
ꢝ
ꢣ
ꢠ
ꢡ
ꢞ
ꢦ
ꢫ
ꢢ
ꢞ
ꢣ
ꢣ
ꢧ
ꢤ
ꢚ
Copyright 2004, Texas Instruments Incorporated
ꢡ
ꢠ
ꢥ
ꢣ
ꢠ
ꢡ
ꢊ
ꢣ
ꢠ
ꢤ
ꢨ
ꢝ
ꢟ
ꢝ
ꢥ
ꢧ
ꢡ
ꢣ
ꢬ
ꢣ
ꢧ
ꢡ
ꢠ
ꢟ
ꢭ
ꢢ
ꢏ
ꢞ
ꢊ
ꢧ
ꢤ
ꢣ
ꢢ
ꢞ
ꢫ
ꢢ
ꢡ
ꢫ
ꢮ
ꢢ
ꢣ ꢧ ꢤ ꢣꢝ ꢞꢰ ꢠꢟ ꢢ ꢪꢪ ꢨꢢ ꢡ ꢢ ꢊ ꢧ ꢣ ꢧ ꢡ ꢤ ꢚ
ꢡ
ꢡ
ꢢ
ꢞ
ꢣ
ꢯ
ꢚ
ꢁ
ꢡ
ꢠ
ꢫ
ꢦ
ꢥ
ꢣ
ꢝ
ꢠ
ꢞ
ꢨ
ꢡ
ꢠ
ꢥ
ꢧ
ꢤ
ꢤ
ꢝ
ꢞ
ꢰ
ꢫ
ꢠ
ꢧ
ꢤ
ꢞ
ꢠ
ꢣ
ꢞ
ꢧ
ꢥ
ꢧ
ꢤ
ꢤ
ꢢ
ꢡ
ꢝ
ꢪ
ꢯ
ꢝ
ꢞ
ꢥ
ꢪ
ꢦ
ꢫ
ꢧ
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍ
ꢏ
ꢖ
ꢘ
ꢐ
ꢘ
ꢕ
ꢖ
ꢓ
ꢌ
ꢍ
ꢎ
ꢙ
ꢌ
ꢔ
ꢌ
ꢕ
ꢖ
ꢁ
ꢕ
ꢖ
ꢆ
ꢌ
ꢀ
ꢖ
ꢋ
ꢗ
ꢑ
ꢐ
<
ꢂ
ꢚ
ꢛ
ꢆ
SLVS552 − OCTOBER 2004
description/ordering information (continued)
• Low noise: The BYPASS pin allows for low noise operation, with a typical output noise of 30 µV (RMS)
with the use of a 10-nF bypass capacitor.
• Small packaging: For the most space-constraint needs, the regulator is available in SOT-23 package,
as well as NanoStar wafer chip scale packaging, offering an even smaller size with improved thermal
and electrical characteristics. NanoStar package technology is a major breakthrough in IC packaging
concepts, using the die as the package.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
ORDERING INFORMATION
PART
GRADE
V
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
OUT
†
PACKAGE
T
J
‡
(NOM)
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
LP2985A-12DBVR
LP2985A-12DBVT
LP2985A-13DBVR
LP2985A-13DBVT
LP2985A-15DBVR
LP2985A-15DBVT
LP2985A-17DBVR
LP2985A-17DBVT
LP2985A-18DBVR
LP2985A-18DBVT
LP2985A-20DBVR
LP2985A-20DBVT
LP2985A-12YEQR
LP2985A-13YEQR
LP2985A-15YEQR
LP2985A-17YEQR
LP2985A-18YEQR
LP2985A-20YEQR
LP2985A-12YZQR
LP2985A-13YZQR
LP2985A-15YZQR
LP2985A-17YZQR
LP2985A-18YZQR
LP2985A-20YZQR
LP2985A-12YEUR
LP2985A-13YEUR
LP2985A-15YEUR
LP2985A-17YEUR
LP2985A-18YEUR
LP2985A-20YEUR
LP2985A-12YZUR
LP2985A-13YZUR
LP2985A-15YZUR
LP2985A-17YZUR
LP2985A-18YZUR
LP2985A-20YZUR
PREVIEW
1.25 V
PREVIEW
PREVIEW
1.35 V
1.5 V
1.7 V
1.8 V
2 V
SOT23-5 (DBV)
PREVIEW
LPT_
PREVIEW
PREVIEW
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoStar − WCSP
0.17-mm Bump (YEQ)
Reel of 3000
Reel of 3000
Reel of 3000
Reel of 3000
A grade:
1% tolerance
−40°C to 125°C
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoFree − WCSP
0.17-mm Bump
(YZQ, Pb-free)
PREVIEW
PREVIEW
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoStar − WCSP
0.30-mm Bump (YEU)
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoFree − WCSP
0.30-mm Bump
(YZU, Pb-free)
PREVIEW
PREVIEW
†
‡
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
DBV: The actual top-side marking has one additional character that designates the assembly/test site.
YEQ/YZQ, YEU/YZU: The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one
following character to designate the assembly/test site. Pin 1 identifier indicates solder-bump composition (1 = SnPb, • = Pb-free).
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍꢏ ꢖ ꢘ ꢐꢘ ꢕ ꢖ ꢓꢌ ꢍꢎ ꢙꢌ ꢔ ꢌ ꢕꢖꢁ ꢕꢖ ꢆ ꢌꢀꢖꢋ ꢗꢑ ꢐ <ꢂ ꢚꢛ ꢆ
SLVS552 − OCTOBER 2004
description/ordering information (continued)
ORDERING INFORMATION
V
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
OUT
†
PACKAGE
T
J
PART GRADE
‡
(NOM)
Reel of 3000
LP2985-12DBVR
LP2985-12DBVT
LP2985-13DBVR
LP2985-13DBVT
LP2985-15DBVR
LP2985-15DBVT
LP2985-17DBVR
LP2985-17DBVT
LP2985-18DBVR
LP2985-18DBVT
LP2985-20DBVR
LP2985-20DBVT
LP2985-12YEQR
LP2985-13YEQR
LP2985-15YEQR
LP2985-17YEQR
LP2985-18YEQR
LP2985-20YEQR
LP2985-12YZQR
LP2985-13YZQR
LP2985-15YZQR
LP2985-17YZQR
LP2985-18YZQR
LP2985-20YZQR
LP2985-12YEUR
LP2985-13YEUR
LP2985-15YEUR
LP2985-17YEUR
LP2985-18YEUR
LP2985-20YEUR
LP2985-12YZUR
LP2985-13YZUR
LP2985-15YZUR
LP2985-17YZUR
LP2985-18YZUR
LP2985-20YZUR
PREVIEW
1.25 V
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
Reel of 3000
Reel of 250
PREVIEW
PREVIEW
1.35 V
1.5 V
1.7 V
1.8 V
2 V
SOT-23 (DBV)
PREVIEW
LPH_
PREVIEW
PREVIEW
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoStar − WCSP
0.17-mm Bump (YEQ)
Reel of 3000
Reel of 3000
Reel of 3000
Reel of 3000
Standard grade:
1.5% tolerance
−40°C to 125°C
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoFree − WCSP
0.17-mm Bump
(YZQ, Pb free)
PREVIEW
PREVIEW
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoStar − WCSP
0.30-mm Bump (YEU)
1.25 V
1.35 V
1.5 V
1.7 V
1.8 V
2 V
PREVIEW
PREVIEW
PREVIEW
PREVIEW
NanoFree − WCSP
0.30-mm Bump
(YZQ, Pb free)
PREVIEW
PREVIEW
†
‡
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
DBV: The actual top-side marking has one additional character that designates the assembly/test site.
YEQ/YZQ, YEU/YZU: The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one
following character to designate the assembly/test site. Pin
1
identifier indicates solder-bump composition
(1 = SnPb, • = Pb-free).
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
functional block diagram
V
IN
ON/OFF
1.23 V
−
V
REF
+
BYPASS
V
OUT
Over-Current/
Over-Temperature
Protection
basic application circuit
LP2985A−xxDBVR
V
OUT
V
IN
1
5
†
2.2 µF
†
1 µF
GND
2
3
}
ON/OFF
4
BYPASS
w
10 nF
†
‡
§
Minimum C
OUT
value for stability (can be increased without limit for improved stability and transient response)
ON/OFF must be actively terminated. Connect to V if shutdown feature is not used.
IN
Optional BYPASS capacitor for low noise operation
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍꢏ ꢖ ꢘ ꢐꢘ ꢕ ꢖ ꢓꢌ ꢍꢎ ꢙꢌ ꢔ ꢌ ꢕꢖꢁ ꢕꢖ ꢆ ꢌꢀꢖꢋ ꢗꢑ ꢐ <ꢂ ꢚꢛ ꢆ
SLVS552 − OCTOBER 2004
†
absolute maximum ratings over the virtual junction temperature range (unless otherwise noted)
Continuous input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V
ON/OFF input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V
Output voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 9 V
Input/output voltage differential, V -V
(see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 16 V
IN OUT
Output current, I (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited (short-circuit protected)
O
Package thermal impedance, θ (see Notes 3 and 4): DBV package . . . . . . . . . . . . . . . . . . . . . . . . 206°C/W
JA
YEQ/YZQ package . . . . . . . . . . . . . . . . . . TBD°C/W
YEU/YZU package . . . . . . . . . . . . . . . . . . . TBD°C/W
Operating virtual junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. If load is returned to a negative power supply in a dual supply system, the output must be diode clamped to GND.
2. The PNP pass transistor has a parasitic diode connected between the input and output. This diode is normally reversed bias
(V > V
for more details).
) but will be forward biased if the output voltage exceeds the input voltage by a diode drop (see Application Information
IN OUT
3. Maximum power dissipation is a function of T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) − T )/θ . Operating at the absolute maximum T of 150°C can affect reliability.
D
J
A
JA
J
4. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
2.2
MAX
UNIT
V
V
V
Supply input voltage
ON/OFF input voltage
Output current
16
IN
−0.3
V
IN
V
ON/OFF
OUT
I
150
125
mA
°C
Virtual junction temperature
T
J
−40
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
electrical characteristics at specified virtual junction temperature range,
V
= V
(nominal)+ 1V, V
= 2 V, C = 1 mF, I = 1 mA, C
= 4.7 mF (unless otherwise noted)
IN
OUT
ON/OFF
IN
L
OUT
LP2985A−XX
MIN TYP MAX
LP2985−XX
TYP
PARAMETER
TEST CONDITIONS
UNIT
T
J
MIN
MAX
I
= 1mA
25°C
25°C
−1
−1.5
−2.5
−2.5
−3.5
1
1.5
2.5
2.5
3.5
−1.5
−2.5
−3.5
−3.0
−4.0
1.5
L
2.5
1 mA ≤ I ≤ 50 mA
Output voltage
tolerance
L
−40°C to 125°C
25°C
3.5
3.0
nV
%V
NOM
OUT
1 mA ≤ I ≤ 150 mA
L
−40°C to 125°C
25°C
4.0
0.007 0.014
0.032
0.007 0.014
0.032
V
[V
=
IN
Line regulation
%/V
V
+ 1 V] to 16 V
−40°C to 125°C
OUT(NOM)
Minimum V to
IN
maintain output
regulation
25°C
2.05
2.05
V
V
IN(MIN)
−40°C to 125°C
2.2
2.2
(see Note 5)
25°C
−40°C to 125°C
25°C
120
280
65
150
250
350
600
95
120
280
65
150
250
350
600
95
I
I
I
I
I
I
I
= 50 mA
= 150 mA
= 0
L
L
L
L
L
L
L
Dropout voltage
(see Note 5)
-V
mV
IN OUT
−40°C to 125°C
25°C
−40°C to 125°C
25°C
125
110
170
220
400
600
1000
1500
2500
0.8
125
110
170
220
400
600
1000
1500
2500
0.8
75
75
= 1 mA
= 10 mA
= 50 mA
= 150 mA
−40°C to 125°C
25°C
120
350
850
120
350
850
−40°C to 125°C
25°C
I
Ground pin current
µA
GND
−40°C to 125°C
25°C
−40°C to 125°C
25°C
V
V
V
< 0.3 V (OFF)
< 0.15 V (OFF)
= HIGH !!
0.01
0.05
0.01
0.05
ON/OFF
ON/OFF
ON/OFF
−40°C to 105°C
−40°C to 125°C
25°C
2
2
5
5
1.4
0.55
0.01
5
1.4
0.55
0.01
5
ON/OFF input
voltage
(see Note 6)
(ON)
−40°C to 125°C
25°C
1.6
1.6
V
V
ON/OFF
V
(OFF)
= LOW !!
ON/OFF
−40°C to 125°C
25°C
0.15
−2
0.15
−2
V
= 0
ON/OFF
ON/OFF
−40°C to 125°C
25°C
ON/OFF input
current
I
µA
ON/OFF
V
= 5 V
−40°C to 125°C
15
15
NOTES: 5. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below the value measured
with
b) V
a
1-V differential. Dropout limits may not apply because
V
must be the greater of a) 2.2 V, or
IN
+ dropout voltage (Max) in order to maintain output regulation.
OUT(nom)
6. The ON/OFF input must be properly driven for reliable operation (see Application Information).
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍꢏ ꢖ ꢘ ꢐꢘ ꢕ ꢖ ꢓꢌ ꢍꢎ ꢙꢌ ꢔ ꢌ ꢕꢖꢁ ꢕꢖ ꢆ ꢌꢀꢖꢋ ꢗꢑ ꢐ <ꢂ ꢚꢛ ꢆ
SLVS552 − OCTOBER 2004
electrical characteristics at specified virtual junction temperature range,
V
= V
(nominal)+ 1V, V
= 2 V, C = 1 mF, I = 1 mA, C
= 4.7 mF (unless otherwise noted)
IN
OUT
ON/OFF
IN
L
OUT
(continued)
LP2985A−XX
LP2985−XX
TYP MAX
PARAMETER
TEST CONDITIONS
UNIT
T
J
MIN
TYP
MAX
MIN
BW = 300 Hz to 50 kHz,
Output noise
(RMS)
C
C
= 10 µF,
OUT
BYPASS
= 1.8 V
V
25°C
25°C
30
30
45
µV
n
= 10 nF,
V
OUT
f = 1kHz,
C
C
Ripple
rejection
nV
/nV
OUT IN
= 10 µF,
45
dB
OUT
= 10 nF
BYPASS
Peak output
current
I
I
V
R
≥ V
− 5%
25°C
25°C
350
400
350
400
mA
mA
OUT(PK)
OUT
O(NOM)
Short circuit
current
= 0 (steady state)
L
OUT(SC)
(see Note 7)
NOTE 7: See Typical Characteristics Curve, Short-Circuit Current vs. V
OUT
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ
ꢏ
ꢖ
ꢘ
ꢐ
ꢘ
ꢕ
ꢖ
ꢓ
ꢌ
ꢍ
ꢎ
ꢙ
ꢌ
ꢔ
ꢌ
ꢕ
ꢖ
ꢁ
ꢕ
ꢖ
ꢆ
ꢌ
ꢀ
ꢖ
ꢋ
ꢗ
ꢑ
ꢐ
<
ꢂ
ꢚ
ꢛ
ꢆ
SLVS552 − OCTOBER 2004
APPLICATION INFORMATION
capacitors
input capacitor (C )
IN
A minimum value of 1 ꢀ F (over the entire operating temperature range) is required at the input of the LP2985LV.
In addition, this input capacitor should be located within 1 cm of the input pin and connected to a clean analog
ground. There are no Equivalent Series Resistance (ESR) requirements for this capacitor and the capacitance
can be increased without limit.
output capacitor (C
)
OUT
As an advantage over other regulators, the LP2985LV permits the use of low ESR capacitors at the output,
including ceramic capacitors that can have an ESR as low as 5 mΩ. Of course, tantalum and film capacitors
can also be used if size and cost are not issues. The output capacitor should also be located within 1 cm of the
output pin and be returned to a clean analog ground.
As with other PNP LDOs, stability conditions require the output capacitor to have a minimum capacitance and
an ESR that falls within a certain range.
Minimum C
: 2.2 µF (can be increased without limit to improve transient response stability margin)
OUT
ESR range: See Figures 1 and 2
Figure 1. 2.2-µF Stable ESR Curves
Figure 2. 4.7-µF Stable ESR Curves
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍꢏ ꢖ ꢘ ꢐꢘ ꢕ ꢖ ꢓꢌ ꢍꢎ ꢙꢌ ꢔ ꢌ ꢕꢖꢁ ꢕꢖ ꢆ ꢌꢀꢖꢋ ꢗꢑ ꢐ <ꢂ ꢚꢛ ꢆ
SLVS552 − OCTOBER 2004
APPLICATION INFORMATION
output capacitor (C
) (continued)
OUT
It is critical that both the minimum capacitance and ESR requirement be met over the entire operating
temperature range. Depending on the type of capacitors used, both these parameters can vary significantly with
temperature (see Capacitor Characteristics section).
noise bypass capacitor (C
)
BYPASS
The LP2985LV allows for low noise performance with the use of a bypass capacitor that is connected to the
internal band-gap reference via the BYPASS pin. This high-impedance band-gap circuitry is biased in the
microampere range and, thus, cannot be loaded significantly, else its output − and correspondingly the output
of the regulator − will change. Thus, for best output accuracy, dc leakage current through C
minimized as much as possible and should never exceed 100 nA.
should be
BYPASS
A 10-nF capacitor is recommended for C
; ceramic and film capacitors are well suited for this purpose.
BYPASS
capacitor characteristics
ceramic
Ceramic capacitors are ideal choices for use on the output of the LP2985LV for several reasons. For
capacitances in the range of 2.2 µF to 4.7 µF, ceramic capacitors have the lowest cost and the lowest ESR,
making them choice candidates for filtering high-frequency noise. For instance, a typical 2.2-µF ceramic
capacitor has an ESR in the range of 10 mΩ to 20mΩ and satisfies minimum ESR requirements of the regulator.
Ceramic capacitors have one glaring disadvantage that must be taken into account − a poor temperature
coefficient, where the capacitance can vary significantly with temperature. For instance, a large-value ceramic
capacitor (≥2.2 µF) can lose more than half of its capacitance as temperature rises from 25°C to 85°C. Thus,
a 2.2 µF at 25°C will drop well below the minimum C
required for stability as ambient temperature rises. For
OUT
this reason, select an output capacitor that maintains the minimum 2.2 µF required for stability over the entire
operating temperature range. Note that there are some ceramic capacitors that can maintain a 15%
capacitance tolerance over temperature.
tantalum
Tantalum capacitors can be used at the output of the LP2985LV, but there are significant disadvantages that
could prohibit their use.
• In the 1-µF to 4.7-µF range, tantalum capacitors are more expensive than ceramics of the equivalent
capacitance and voltage ratings.
• Tantalum capacitors have higher ESRs than their equivalent-sized ceramic counterparts. Thus, to meet
the ESR requirements, a higher-capacitance tantalum may be required, at the expense of larger size
and higher cost.
• The ESR of a tantalum capacitor increases as temperature drops, as much as double from 25°C to
−40°C. Thus, ESR margins must be maintained over the temperature range in order to prevent
regulator instability.
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
APPLICATION INFORMATION
ON/OFF operation
The LP2985LV allows for a shutdown mode via the ON/OFF pin. Driving the pin LOW (≤0.3 V) turns the device
OFF, conversely, a HIGH (≥1.6 V) turns the device ON. If the shutdown feature is not used, the ON/OFF pin
should be connected to the input to ensure that the regulator is on at all times. For proper operation, do not leave
the ON/OFF pin unconnected and apply a signal with a slew rate of ≥40 mV/µs.
reverse input-output voltage
There is an inherent diode present across the PNP pass element of the LP2985LV.
V
IN
V
OUT
With the anode connected to the output, this diode is reverse biased during normal operation since the input
voltage is higher than the output. However, if the output is pulled higher than the input for any reason, this diode
will be forward biased and can cause a parasitic silicon-controlled rectifier (SCR) to latch, resulting in high
current flowing from the output to the input. Thus, to prevent possible damage to the regulator in any application
where the output may be pulled above the input, an external Schottky diode must be connected between the
output and input. With the anode on output, this Schottky limits the reverse voltage across the output and input
pins to ꢀ0.3 V, preventing the regulator’s internal diode from forward biasing.
Schottky
V
IN
V
OUT
LP2985LV
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀ ꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇꢅ ꢈꢉꢊ ꢋ ꢀ ꢌꢍꢉꢎ ꢌ ꢏꢐ ꢑ ꢒ ꢀꢌ ꢍꢉꢓꢔ ꢌꢁ ꢌ ꢕꢖ ꢔ ꢑꢗ ꢕꢀ ꢋꢖꢌ ꢔ
ꢍꢏ ꢖ ꢘ ꢐꢘ ꢕ ꢖ ꢓꢌ ꢍꢎ ꢙꢌ ꢔ ꢌ ꢕꢖꢁ ꢕꢖ ꢆ ꢌꢀꢖꢋ ꢗꢑ ꢐ <ꢂ ꢚꢛ ꢆ
SLVS552 − OCTOBER 2004
WAFER CHIP SCALE INFORMATION
LP2985x-xxYEQ NanoStar (0.17-mm Bump)
LP2985x-xxYZQ NanoFree (0.17-mm Pb-Free Bump)
987
1,037
1,287
1,337
Pin A1 Index Area
0,19
0,15
0,625 Max
0,15
0,10
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. NanoStar package configuration
D. This package is tin-lead (SnPb), consult the factory for availability of lead-free material.
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
ꢀꢁ ꢂꢃ ꢄꢅ ꢀꢆ
ꢇ ꢅ ꢈ ꢉꢊꢋ ꢀ ꢌ ꢍꢉꢎꢌ ꢏꢐ ꢑꢒ ꢀ ꢌꢍꢉꢓꢔꢌ ꢁ ꢌꢕꢖ ꢔꢑꢗ ꢕ ꢀꢋꢖꢌ ꢔ
ꢍ ꢏꢖ ꢘ ꢐꢘꢕ ꢖꢓ ꢌꢍ ꢎ ꢙ ꢌ ꢔ ꢌ ꢕꢖ ꢁꢕꢖ ꢆꢌ ꢀꢖꢋꢗ ꢑ ꢐ <ꢂꢚ ꢛ ꢆ
SLVS552 − OCTOBER 2004
WAFER CHIP SCALE INFORMATION
LP2985x-xxYEU NanoStar (0.30-mm Bump)
LP2985x-xxYZU NanoFree (0.30-mm Pb-Free Bump)
987
1,037
1,287
1,337
Pin A1 Index Area
0,35
0,25
0,75 Max
0,30
0,20
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. NanoStar package configuration
D. This package is tin-lead (SnPb), consult the factory for availability of lead-free material.
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products
Applications
Audio
Amplifiers
amplifier.ti.com
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DSP
dsp.ti.com
Broadband
Digital Control
Military
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/military
Interface
Logic
interface.ti.com
logic.ti.com
Power Mgmt
Microcontrollers
power.ti.com
Optical Networking
Security
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
microcontroller.ti.com
Telephony
Video & Imaging
Wireless
www.ti.com/wireless
Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2004, Texas Instruments Incorporated
LP2985A-12YEQR 相关器件
型号 | 制造商 | 描述 | 价格 | 文档 |
LP2985A-12YEUR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-12YZQR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-12YZUR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13DBVR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13DBVT | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13YEQR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13YEUR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13YZQR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-13YZUR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 | |
LP2985A-15DBVR | TI | 150-mA LOW-NOISE, LOW-DROPOUT REGULATOR WITH SHUTDOWN FOR OUTPUT VOLTAGES<2.3V | 获取价格 |
LP2985A-12YEQR 相关文章
- 2024-09-20
- 5
- 2024-09-20
- 8
- 2024-09-20
- 8
- 2024-09-20
- 6