الصفحة الرئيسية > الدوائر المتكاملة الدوائر المتكاملة > TPS7A7001DDAT

TPS7A7001DDAT

2A ultra-LDO, 1.425-6.5V in, adj 0.5-5V out, 200mV dropout@1A, enable pin, HSOIC-8 PowerPAD

3200

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TPS7A7001DDAT

الحزمة ： الحزمة

HSOIC-8 with PowerPAD (4.9 x 6.0 x 1.5mm)

العلامة التجارية ： العلامة التجارية

فئات المنتجات:：فئات المنتجات

الدوائر المتكاملة الدوائر المتكاملة, منظِّمات التسرب المنخفض (LDO)

توصيات أخرى قد تكون مهتماً بها.

SII9396SCNUC-BAR

IS43TR16256BL-125KBLI

الوصف

نظرة عامة على المنتج

The TPS7A7001DDAT is a 2A ultra-low-dropout (LDO) regulator from Texas Instruments operating from inputs as low as 1.425V with only 200mV typical dropout at 1A. The adjustable output (0.5V to 5V) is set by an external resistor divider. With an enable pin (1µA shutdown current), ±2% output accuracy, current limit, and thermal shutdown, it is ideal for point-of-load regulation where input and output voltages are very close.

المواصفات الرئيسية

نوع الإخراج	Adjustable (0.5V to 5V via external divider)
تيار الإخراج	2A maximum
جهد الإدخال	1.425V to 6.5V
جهد التسرب	200mV typ @ 1A; 380mV max @ 2A
Reference Voltage	0.5V (typical)
دقة الإخراج	±2% over line, load, temperature
Line Regulation	0.2%/V (typical)
Load Regulation	0.25%/A (typical)
تيار التهدئة	3mA (typical)
تيار إيقاف التشغيل	1µA (typical)
PSRR @ 100kHz	28 dB
Enable Pin	Yes (active high)
Protection	Current limit, thermal shutdown, UVLO
Min Output Capacitor	4.7µF
الحزمة	HSOIC-8 with PowerPAD (4.9 x 6.0mm)
درجة حرارة التشغيل	-40°C to +125°C (junction)
θJA	46.4°C/W (DDA package)

الميزات

Ultra-low input voltage: operates down to 1.425V
Ultra-low dropout: 200mV at 1A, 380mV max at 2A
Adjustable output from 0.5V using external divider
2A continuous output current
Enable pin with 1µA shutdown current
±2% output voltage accuracy
Current limit and thermal shutdown protection
Stable with 4.7µF ceramic output capacitor
Supports up to 200µF output capacitance
Feed-forward capacitor option for improved transient response

التطبيقات

Point-of-load regulation for FPGAs and DSPs
Core voltage regulation (1.0V to 1.8V rails)
Battery-powered systems with low headroom
Post-regulation after switching converters
Telecom and networking card power
Medical and portable devices

مقدمة المنتج:TPS7A7001DDAT مقدمة المنتج

The TPS7A7001DDAT is a high-performance 2A ultra-low-dropout linear regulator from Texas Instruments, designed for applications requiring very low input voltage and very low dropout. The device operates from input voltages as low as 1.425V and provides an adjustable output from 0.5V to 5V set by an external resistor divider. The dropout voltage is only 200mV typical at 1A and 380mV maximum at 2A, making it ideal for point-of-load regulation where VOUT is very close to VIN. The enable pin reduces shutdown current to 1µA, critical for battery-powered always-on systems. A feed-forward capacitor across the upper feedback resistor can improve transient response and PSRR. The HSOIC-8 PowerPAD package provides 46.4°C/W thermal resistance for efficient heat dissipation at full load.

مبدأ العمل:TPS7A7001DDAT مبدأ العمل

The TPS7A7001 uses a PNP pass transistor in a low-dropout configuration. The error amplifier compares a fraction of the output voltage (divided by R1 and R2) with the internal 0.5V bandgap reference. When VFB falls below 0.5V, the error amplifier drives the PNP base harder, increasing the pass transistor current and raising VOUT. The output voltage is set by VOUT = 0.5V × (1 + R1/R2). The ultra-low dropout is achieved because the PNP pass transistor saturates with only a small VCE — unlike NPN LDOs which require at least a VBE plus VCE(sat) of dropout. The enable pin gates the internal bias circuitry; when EN is low, all bias is shut down, reducing current to 1µA. The current limit circuit senses the pass transistor current and limits it to a safe value (typically 3A). Thermal shutdown activates at approximately 160°C junction temperature, turning off the pass transistor until the junction cools by 20°C. A feed-forward capacitor (CFF) across R1 adds a zero to the feedback loop, improving phase margin and transient response.

وصف الدبوس:TPS7A7001DDAT تعريف الدبوس ووظائفه

دبوس	الاسم	الوصف
1	نورث كارولاينا	No connect
2	في	Input supply (1.425V to 6.5V)
3	في	Input supply (connect to pin 2)
4	EN	Enable input (high = enabled, internal pull-up)
5	GND	أرضي
6	FB	Feedback input (connect to output divider)
7	انتهى	Regulated output
8	انتهى	Regulated output (connect to pin 7)
الوسادة	GND	PowerPAD thermal pad (connect to GND plane)

Application Scenarios:In which products and applications isTPS7A7001DDAT مستعمل

FPGA Core Voltage (1.0V): Generate a 1.0V, 2A core supply for an FPGA from a 1.5V intermediate bus. The 200mV dropout at 1A leaves comfortable headroom. Set VOUT = 0.5V × (1 + R1/R2) with R2 = 10kΩ and R1 = 10kΩ. Add a 10nF feed-forward capacitor across R1 for improved transient response during FPGA logic switching events.
Battery-Powered Always-On Rail: Regulate a 3.6V lithium cell down to 3.3V for a wireless MCU. The 1.425V minimum input ensures operation even as the battery discharges to 3.4V. The enable pin connects to the MCU’s power management output, reducing current to 1µA during deep sleep. The 4.7µF ceramic output capacitor fits within the BOM budget.
Post-Regulation After DC/DC: Place the TPS7A7001 after a 1.8V switching converter to clean the 1.2V rail for a noise-sensitive ADC. The 200mV dropout consumes only 200mV of headroom from the 1.8V supply, and the 28dB PSRR at 100kHz further attenuates the switching ripple. A 10µF feed-forward capacitor optimizes the PSRR at higher frequencies.

Alternative Models:What chips are recommended as replacements for TPS7A7001DDAT

الطراز	Iout	Vin Min	Dropout	الفرق الرئيسي
TPS7A7002	2A	1.425V	380mV	Fixed voltage version
TPS7A8300	2A	1.1V	85mV	Lower dropout, lower Vin, higher PSRR
TLV755P	1A	1.5V	300mV	Smaller, lower current, SOT-23
NCP51100	1A	1.2V	200mV	onsemi, lower Vin alternative