الصفحة الرئيسية > الدوائر المتكاملة الدوائر المتكاملة > LM3880MFX-1AE/NOPB

LM3880MFX-1AE/NOPB

3-rail power sequencer, 2.7-5.5V, -1AE timing, open-drain, SOT-23-6

5340

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جزء الشركة المصنعة ： جزء الشركة المصنعة

LM3880MFX-1AE/NOPB

الحزمة ： الحزمة

SOT-23-6 (2.9 × 1.6 × 1.0 mm)

العلامة التجارية ： العلامة التجارية

فئات المنتجات:：فئات المنتجات

الدوائر المتكاملة الدوائر المتكاملة, الدوائر المتكاملة لإدارة الطاقة (PMIC)

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الوصف

نظرة عامة على المنتج

The LM3880MFX-1AE/NOPB is a 3-rail simple power sequencer from Texas Instruments, packaged in a 6-pin SOT-23 (DBV) package. It provides controlled power-up and power-down sequencing of three voltage rails through open-drain output flags with fixed timing delays. The -1AE suffix defines the specific timing and sequence configuration, enabling easy cascading for up to 9 rails.

المواصفات الرئيسية

الوظيفة	3-Rail Power Sequencer
Sequenced Rails	3
جهد الإمداد	2.7V to 5.5V
IQ	25μA (typical)
نوع الإخراج	Open-Drain
Sequence Configuration	-1AE (factory set)
Cascadable	Up to 9 rails (3 devices)
الحزمة	6-pin SOT-23 (2.9 × 1.6 mm)
درجة حرارة التشغيل	-40 درجة مئوية إلى +125 درجة مئوية

الميزات

Simple 3-rail power sequencing with single enable input
Cascadable up to 9 rails using 3 devices
Independent power-up and power-down sequence control
Ultra-low quiescent current of 25μA
Open-drain outputs pull up to different voltage rails
EPROM-based timing configuration

التطبيقات

FPGA power supply sequencing
Multi-rail processor power management
DSP and SoC system power control
Industrial control module sequencing
Telecom card power management

مقدمة المنتج:LM3880MFX-1AE/NOPB مقدمة المنتج

The LM3880 is a simple 3-rail power sequencer that provides controlled power-up and power-down sequencing of multiple voltage rails. When enabled, three open-drain output flags are sequentially released with fixed time delays, allowing connected power supplies to start in order. During power-down, the outputs follow the reverse sequence to avoid latch-up conditions. The -1AE suffix defines a specific timing and sequence configuration set at the factory via EPROM. The open-drain outputs can be pulled up to different voltage rails (up to VDD + 0.3V), providing flexibility in interfacing with various enable logic levels. Multiple LM3880 devices can be cascaded to sequence up to 9 rails.

مبدأ العمل:LM3880MFX-1AE/NOPB مبدأ العمل

The LM3880 operates as a state machine controlling three open-drain output flags (FLAG1, FLAG2, FLAG3). When the EN pin is driven high, the device begins the power-up sequence: FLAG1 releases first after the initial delay, then FLAG2 and FLAG3 release sequentially at their respective fixed timing intervals. Each open-drain output, when released, allows the external pull-up resistor to drive the connected power supply enable pin high. When EN goes low, the power-down sequence executes in reverse order (FLAG3, then FLAG2, then FLAG1) to ensure proper supply discharge and prevent latch-up. The timing delays are stored in internal EPROM, which can be custom-configured by TI for non-standard requirements. The precision enable threshold ensures reliable triggering from logic or resistor-divided voltage sources.

وصف الدبوس:LM3880MFX-1AE/NOPB تعريف الدبوس ووظائفه

دبوس	الاسم	النوع	الوظيفة
1	VDD	الطاقة	Supply voltage (2.7-5.5V)
2	GND	الطاقة	أرضي
3	EN	المدخلات	Enable — precision threshold, high starts sequence
4	FLAG3	المخرجات	Open-drain output flag 3 (last in power-up)
5	FLAG2	المخرجات	Open-drain output flag 2
6	FLAG1	المخرجات	Open-drain output flag 1 (first in power-up)

Application Scenarios:In which products and applications isLM3880MFX-1AE/NOPB مستعمل

Sequencing 3.3V, 1.8V, and 1.0V rails for FPGA power
Multi-voltage DSP power-up/down control in telecom boards
SoC core, I/O, and PLL rail sequencing
Industrial controller power supply order management
Cascaded 9-rail sequencing for complex processor systems

Alternative Models:What chips are recommended as replacements for LM3880MFX-1AE/NOPB

الشركة المصنعة	رقم الجزء	الحزمة	الملاحظات
TI	LM3880MFX-3AE/NOPB	SOT-23-6	Different timing configuration
TI	TPS386600	VQFN-16	Quad supervisor with sequencing
ADI	ADM1186	QSOP-16	4-channel sequencer/monitor
مكسيم	MAX16029	TDFN-10	Quad sequencer with timeout
رينيساس	ISL22316	QFN-16	6-channel sequencer