TPS7350低 dropout 电压调节器数据手册

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"TPS7350是一款开关稳压芯片，具有内置延迟重置功能的低 dropout 电压调节器。该芯片家族包括多种型号，如TPS7301Q、TPS7325Q、TPS7330Q、TPS7333Q、TPS7348Q和TPS7350Q，提供固定输出和可调版本，适用于不同电压需求。" TPS7350的主要特性包括： 1. 低dropout电压：在负载电流为100mA时，最大dropout电压仅为35mV，确保了高效能和稳定供电。 2. 集成精密电源电压监控器：能够监测并调节输出电压，保证了电源的稳定性。 3. 主动低电平复位信号：具备200毫秒脉冲宽度的主动低电平复位功能，适用于微处理器系统的需求。 4. 超低静态电流：在正常工作状态下，静态电流仅为340μA，降低了整体系统的功耗。 5. 极低睡眠状态电流：在睡眠模式下，电流最大为0.5μA，进一步节省了待机时的电力。 6. 高精度输出电压：对于固定输出版本，在全负载、线路和温度范围内，输出电压精度保持在2%以内。 7. 广泛的输出电流范围：能够提供0mA到500mA的输出电流，适应各种负载条件。 8. TSSOP封装选项：这种封装设计降低了组件的高度，适合于空间有限或对高度有严格要求的应用场景。此外，TPS7350与TPS71xx和TPS72xx系列的区别在于其内置的延迟重置功能。如果不需要这个特性，可以考虑使用TPS71xx或TPS72xx系列作为替代。这些器件家族为设计者提供了灵活性，可以根据具体应用的需求选择最适合的LDO（低压差）稳压器。 TPS7350是适用于微处理器和关键系统电源管理的理想选择，其低功耗、高精度和集成的重置功能使其在众多同类产品中脱颖而出。在使用TPS7350时，设计者需要注意选择适当的电压等级、输出电流能力和封装类型，以满足电路的特定需求，并充分利用其低dropout性能和电源监控功能，以保证系统的可靠性和效率。

TPS7301Q, TPS7325Q, TPS7330Q, TPS7333Q, TPS7348Q, TPS7350Q

LOW-DROPOUT VOLTAGE REGULATORS

WITH INTEGRATED DELAYED RESET FUNCTION

SLVS124F – JUNE 1995 – REVISED JANUARY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS7301Q electrical characteristics at I

= 10 mA, V

= 3.5 V, EN = 0 V, C

= 4.7 µF (CSR

†

= 1 Ω), FB

shorted to OUT at device leads (unless otherwise noted)

PARAMETER

TEST CONDITIONS

‡

MIN TYP MAX

UNIT

25°C 1.182 V

Reference voltage (measured at FB)

2.5 V ≤ V

≤ 10 V,

See Note 1

5 mA ≤ I

≤ 500 mA,

–40°C to 125°C 1.147 1.217 V

Reference voltage temperature

coefficient

–40°C to 125°C 61 75 ppm/°C

=24V

50 µA ≤ I

≤ 150 mA

25°C 0.7 1

≤

150

–40°C to 125°C 1

=24V

150 mA ≤ I

≤ 500 mA

25°C 0.83 1.3

Pass-element series resistance

150

≤

500

–40°C to 125°C 1.3

Ω

(See Note 2)

=29V

50 µA ≤ I

≤ 500 mA

25°C 0.52 0.85

Ω

≤

500

–40°C to 125°C 0.85

= 3.9 V, 50 µA ≤ I

≤ 500 mA 25°C 0.32

= 5.9 V, 50 µA ≤ I

≤ 500 mA 25°C 0.23

ut regulation

= 2.5 V to 10 V, 50

A ≤ I

≤ 500 mA,

25°C 3 18

Inp

reg

lation

See Note 1

–40°C to 125°C 25

2.5 V ≤ V

≤ 10 V, I

= 5 mA to 500 mA,

25°C 5 14

Out

ut regulation

See Note 1

–40°C to 125°C 25

reg

lation

2.5 V ≤ V

≤ 10 V, I

= 50

A to 500 mA,

25°C 7 22

See Note 1

µ ,

–40°C to 125°C 54

=50µA

25°C 48 59

le rejection

f = 120 Hz

–40°C to 125°C 44

Ripple

rejection

120

= 500 mA,

25°C 45 54

See Note 1

–40°C to 125°C 44

Output noise-spectral density f = 120 Hz 25°C 2

µV/√Hz

= 4.7 µF 25°C 95

Output noise voltage 10 Hz ≤ f ≤ 100 kHz

= 10 µF 25°C 89

µVrms

= 100 µF 25°C 74

RESET trip-threshold voltage

O(FB)

decreasing –40°C to 125°C 1.101 1.145 V

RESET hysteresis voltage

Measured at V

O(FB)

25°C 12 mV

RESET out

ut low voltage

= 2 13 V

O(RESET)

= 400 µA

25°C 0.1 0.4

RESET

ow vo

age

O(RESET)

400

–40°C to 125°C 0.4

FB in

ut current

25°C –10 0.1 10

inp

rrent

–40°C to 125°C –20 20

†

CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance

to C

‡

Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must

be taken into account separately.

Output voltage programmed to 2.5 V with closed-loop configuration (see application information).

NOTES: 1. When V

< 2.9 V and I

> 150 mA simultaneously, pass element r

DS(on)

increases (see Figure 33) to a point where the resulting

dropout voltage prevents the regulator from maintaining the specified tolerance range.

2. To calculate dropout voltage, use equation: V

= I

⋅ r

DS(on)

is a function of both output current and input voltage. This parametric table lists r

DS(on)

for V

= 2.4 V, 2.9 V, 3.9 V, and

5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V respectively. For other

programmed values, refer to Figure 33.

TPS7301Q, TPS7325Q, TPS7330Q, TPS7333Q, TPS7348Q, TPS7350Q

LOW-DROPOUT VOLTAGE REGULATORS

WITH INTEGRATED DELAYED RESET FUNCTION

SLVS124F – JUNE 1995 – REVISED JANUARY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS7325Q electrical characteristics at I

= 10 mA, V

= 3.5 V, EN = 0 V, C

= 10 µF (CSR

†

= 1 Ω), SENSE

shorted to OUT (unless otherwise noted)

PARAMETER

TEST CONDITIONS

‡

MIN TYP MAX

UNIT

Out

ut voltage

25°C 2.45 2.5 2.55

oltage

3.5 V ≤ V

≤ 10 V, 5 mA ≤ I

≤ 500 mA –40°C to 125°C 2.425 2.575

=10mA

= 2 97 V

25°C 5

–40°C to 125°C 14

Dropout voltage

= 100 mA

= 2 97 V

25°C 50 80

ropou

age

100

–40°C to 125°C 150

= 500 mA

= 2 97 V

25°C 270 400

500

–40°C to 125°C 600

Pass element series resistance

(2.97 V – V

)/I

, V

= 2.97 V,

25°C 0.5 0.7

Ω

Pass

element

series

resistance

(

)

= 500 mA

–40°C to 125°C 1.4

Ω

ut regulation

=35Vto10V

50 µA ≤ I

≤ 500 mA

25°C 6 20

Inp

reg

lation

≤

500

–40°C to 125°C 25

=5mAto500mA

35V≤ V

≤ 10 V

25°C 20 32

Out

ut regulation

500

≤

–40°C to 125°C 50

reg

lation

=50µA to 500 mA

35V≤ V

≤ 10 V

25°C 28 60

500

≤

–40°C to 125°C 100

=50µA

25°C 50 53

le rejection

f = 120 Hz

–40°C to 125°C 49

Ripple

rejection

120

= 500 mA

25°C 49 53

500

–40°C to 125°C 32

Output noise-spectral density f = 120 Hz 25°C 2

µV/√Hz

= 4.7 µF

25°C 274

Output noise voltage 10 Hz ≤ f ≤ 100 kHz

= 10 µF

25°C 228

µVrms

= 100 µF

25°C 159

RESET trip-threshold voltage

decreasing –40°C to 125°C 2.23 2.32 2.39 V

RESET out

ut low voltage

=21V

O(RESET)

=08mA

25°C 0.14 0.4

RESET

output

low

voltage

O(RESET)

= –

–40°C to 125°C 0.4

†

CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance

to C

‡

Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must

be taken into account separately.

Dropout test and pass-element series resistance test are not production tested. Test method requires SENSE terminal to be disconnected from

output voltage.

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