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TI的LP2966是一款双路150mA超低静态电压降稳压器，设计用于电池供电和便携式应用。该器件的主要特点包括极低的压差电压、低地线电流、独立的每个稳压器关断功能、低静息电流以及输出电压精度高。 1. **极低压差电压**：LP2966的压差电压随着负载电流的变化而线性变化。在1mA负载电流下，压差通常仅为0.9mV，而在150mA负载电流下，压差为135mV。这使得它在低电源电压条件下也能稳定工作。 2. **低地线电流**：在1mA负载电流下，地线电流典型值为300μA，而在100mA负载电流下，这一数值增加到340μA。这有助于减少电源的能耗，对电池寿命有积极影响。 3. **独立关断功能**：每个LDO稳压器都有独立的关断控制，可以通过拉低一个关断引脚实现。当两个关断引脚都处于低电平时，关断模式下的静态电流低于1μA，这显著降低了待机功耗。 4. **低静息电流**：在关断模式中，LP2966的静态电流小于1μA，这在电池供电设备中尤为重要，因为它可以延长电池寿命。 5. **高精度输出电压**：LP2966提供±1%的输出电压精度，确保在室温下从1.8V到5.0V范围内的多种预设输出电压选项。这意味着输出电压非常稳定，适用于对电压稳定性要求高的应用。 6. **低输出噪声**：该器件具有出色的低输出噪声性能，这在需要低噪声电源的系统中特别有价值，例如无线通信设备和数据终端。 7. **错误标志**：每个输出都有一个开漏错误标志，当相应的输出电压下降到标称值的90%以下时，该标志会变为低电平。这为系统状态监测提供了方便。 8. **封装与兼容性**：LP2966采用VSSOP-8表面贴装封装，尺寸紧凑，适合空间有限的应用。此外，它能够与低ESR陶瓷电容器配合使用，降低了外部组件的要求。 9. **保护功能**：该芯片具有过温度和过电流保护，确保了在极端条件下的可靠性。 10. **应用广泛**：LP2966适用于各种电池供电和便携式设备，如蜂窝电话和无线应用、掌上电脑和笔记本电脑、GPS系统、平板显示器、后级稳压器、USB应用、手持设备和多米器，以及无线数据终端等。 TI的LP2966是一款高性能、低功耗的双路LDO稳压器，特别适用于需要高效能电源管理且对体积和功耗有严格要求的电子设备。其特性使其在众多电池供电的移动和便携式应用中成为理想选择。

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LP2966

www.ti.com

SNVS028E –APRIL 2000–REVISED APRIL 2013

Dual 150mA Ultra Low-Dropout Regulator

Check for Samples: LP2966

FEATURES

KEY SPECIFICATIONS

• Ultra Low Drop-Out Voltage

• Dropout Voltage: Varies Linearly with Load

Current. Typically 0.9 mV at 1mA Load Current

• Low Ground Pin Current

and 135mV at 150mA Load Current

• <1µA Quiescent Current in Shutdown Mode

• Ground Pin Current: Typically 300µA at 1mA

• Independent Shutdown of Each LDO Regulator

Load Current and 340µA at 100mA Load

• Output Voltage Accuracy ±1%

Current (with One Shutdown Pin Pulled Low)

• Ensured 150mA Output Current at Each

• Shutdown Mode: Less than 1µA Quiescent

Output

Current when Both Shutdown Pins are Pulled

• Low Output Noise

Low

• Error Flags Indicate Status of Each Output

• Error Flag: Open Drain Output, Goes Low

• Available in VSSOP-8 Surface Mount Package when the Corresponding Output Drops 10%

Below Nominal

• Low Output Capacitor Requirements (1µF)

• Precision Output Voltage: Multiple Output

• Operates with Low ESR Ceramic Capacitors in

Voltage Options Available Ranging from 1.8V

Most Applications

to 5.0V with an Ensured Accuracy of ±1% at

• Over Temperature/Over Current Protection

Room Temperature

• -40°C to +125°C Junction Temperature Range

DESCRIPTION

APPLICATIONS

The LP2966 dual ultra low-dropout (LDO) regulator

• Cellular and Wireless Applications

operates from a +2.70V to +7.0V input supply. Each

output delivers 150mA over full temperature range.

• Palmtop/Laptop Computer

The IC operates with extremely low drop-out voltage

• GPS Systems

and quiescent current, which makes it very suitable

• Flat Panel Displays

for battery powered and portable applications. Each

LDO in the LP2966 has independent shutdown

• Post Regulators

capability. The LP2966 provides low noise

• USB Applications

performance with low ground pin current in an

• Hand Held Equipment and Multimeters

extremely small VSSOP-8 package (refer to package

dimensions and CONNECTION DIAGRAM for more

• Wireless Data Terminals

information on VSSOP-8 package). A wide range of

• Other Battery Powered Applications

preset voltage options are available for each output.

In addition, many more are available upon request

with minimum orders. In all, 256 voltage combinations

are possible.

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

LP2966

www.ti.com

SNVS028E –APRIL 2000–REVISED APRIL 2013

PIN DESCRIPTIONS

Pin Name Function

1 VIN Input Supply pin

2 SD1 Active low shutdown pin for output 1

3 SD2 Active low shutdown pin for output 2

4 GND Ground

5 ERROR2 Error flag for output 2 - Normally high impedance, should be connected to ground if not used.

6 ERROR1 Error flag for output 1 - Normally high impedance, should be connected to ground if not used.

7 VOUT2 Output 2

8 VOUT1 Output 1

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1)(2)

Storage Temperature Range −65 to +150°C

Lead Temp. (Soldering, 5 sec.) 260°C

Power Dissipation

(3)

Internally Limited

ESD Rating

(4)

2kV

Input Supply Voltage (Survival) −0.3V to 7.5V

Shutdown Input Voltage (Survival) −0.3V to (Vin + 0.3V)

Maximum Voltage for ERROR Pins 10V

OUT

(Survival) Short Circuit Protected

Output Voltage (Survival)

(5)(6)

−0.3V to (Vin + 0.3V)

(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for

which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test

conditions, see ELECTRICAL CHARACTERISTICS. The ensured specifications apply only for the test conditions listed. Some

performance characteristics may degrade when the device is not operated under the listed test conditions.

(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3) At elevated temperatures, devices must be derated based on package thermal resistance. The device in the surface-mount package

must be derated at θ

= 235°C/W, junction-to-ambient. Please refer to APPLICATIONS INFORMATION: Maximum Current Capability

for further information. The device has internal thermal protection.

(4) The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.

(5) If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2966 output must be diode-clamped to

ground.

(6) The output PMOS structure contains a diode between the V

and V

OUT

terminals that is normally reverse-biased. Reversing the polarity

from V

and V

OUT

will turn on this diode.

OPERATING RATINGS

(1)

Input Supply Voltage 2.7V to 7.0V

Shutdown Input Voltage −0.3V to (Vin + 0.3V)

Operating Junction Temperature Range −40°C to +125°C

Maximum Voltage for ERROR pins 10V

(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for

which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test

conditions, see ELECTRICAL CHARACTERISTICS. The ensured specifications apply only for the test conditions listed. Some

performance characteristics may degrade when the device is not operated under the listed test conditions.

Product Folder Links: LP2966

LP2966

SNVS028E –APRIL 2000–REVISED APRIL 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

Limits in standard typeface are for T

= 25°C, and limits in boldface type apply over the full operating junction temperature

range. Unless otherwise specified, V

= V

O(NOM)

+ 1V

(1)

, C

OUT

= 1µF, I

OUT

= 1mA, C

= 1µF, V

SD1

= V

SD2

= V

LP2966IMM

(3)

Symbol Parameter Conditions Typ

(2)

Unit

Min Max

(4)

Output Voltage V

OUT

+ 1V < V

< 7.0V 0.0 −1 1

NOM

Tolerance

-3 3

1mA < I

< 100mA 0.0 −1.5 1.5

NOM

-3.5 3.5

ΔV

/ΔV

(4)(5)

Output Voltage Line 0.1 mV/V

Regulation

ΔV

/ΔI

OUT

Output Voltage Load 1mA < I

< 100mA

(6)

0.1 mV/mA

Regulation

(6)

ΔV

/ΔI

OUT1

Output Voltage Cross 1mA < I

< 100mA

(7)

0.0004

mV/mA

Regulation

(7)

-V

OUT

Dropout Voltage

(8)

= 1mA 0.9 2.0

3.0

= 100mA 90 130

180

= 150mA 135 195

270

GND(1,0)

(9)

Ground Pin Current I

= 1mA 300

(One LDO On)

SD2

≤ 0.1V, V

SD1

= V

µA

= 100mA 340

SD2

≤ 0.1V, V

SD1

= V

GND(1,1)

Ground Pin Current I

= 1mA 340 450

(Both LDOs On)

500

µA

= 100mA 420 540

600

GND(0,0)

Ground Pin Current in V

SD1

= V

SD2

≤ 0.1V 0.006 0.3

µA

Shutdown Mode

O(PK)

Peak Output Current See

(10)

500 350

OUT

≥ V

OUT(NOM)

- 5%

150

Short Circuit Foldback Protection

Short Circuit Foldback See

(10)(11)

600 mA

Knee

(1) The condition V

= V

O(NOM)

+ 1V applies when Vout1 = Vout2. If Vout1 ≠ Vout2, then this condition would apply to the output which is

greater in value. As an example, if Vout1 = 3.3V and Vout2 = 5V, then the condition V

= V

O(NOM)

+ 1V would apply to Vout2 only.

(2) :Typical numbers are at 25°C and represent the most likely parametric norm.

(3) :Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using

Statistical Quality Control (SQC) methods. The limits are used to calculate Averaging Outgoing Quality Level (AOQL).

(4) Output voltage tolerance specification also includes the line regulation and load regulation.

(5) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in input line voltage.

(6) Output voltage load regulation is defined as the change in output voltage from the nominal value when the load current changes from

1mA to 100mA.

(7) Output voltage cross regulation is defined as the percentage change in the output voltage from the nominal value at one output when

the load current changes from 1mA to full load in the other output. This is an important parameter in multiple output regulators. The

specification for ΔV

/ΔI

OUT2

is equal to the specification for ΔV

/ΔI

OUT1

(8) Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the nominal value. Drop-out

voltage specification applies only to output voltages greater than 2.7V. For output voltages below 2.7V, the drop-out voltage is nothing

but the input to output differential, since the minimum input voltage is 2.7V.

(9) The limits for the ground pin current specification, I

GND(0,1)

will be same as the limits for the specification, I

GND(1,0)

(10) At elevated temperatures, devices must be derated based on package thermal resistance. The device in the surface-mount package

must be derated at θ

= 235°C/W, junction-to-ambient. Please refer to APPLICATIONS INFORMATION: Maximum Current Capability

for further information. The device has internal thermal protection.

(11) LP2966 has fold back current limited short circuit protection. The knee is the current at which the output voltage drops 10% below the

nominal value.

Product Folder Links: LP2966

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