SGM800-2.93YN5G: Technical Guide to SGMICRO's 2.93V Voltage Detector

Introduction

The SGM800-2.93YN5G is a precision voltage detector (voltage supervisor) manufactured by SGMICRO, featuring 2.93V detection threshold with high accuracy (±1.5%), ultra-low supply current (0.5 μA typical), and active-low reset output in compact SOT-23-5 package, designed for microcontroller reset generation, battery monitoring, and power supply supervision in portable and battery-powered applications.

This voltage detector monitors supply voltage and asserts reset signal when voltage drops below 2.93V threshold, ensuring reliable system operation during power-up, power-down, and brownout conditions. With wide operating range (0.7V to 6.0V) and minimal power consumption, it enables robust power management in IoT devices, wearables, and battery-operated systems.

---

Technical Overview

Core Specifications

Parameter	Specification
Detection Voltage	2.93V (Vth)
Accuracy	±1.5%
Supply Current	0.5 μA typical
Output Type	Active-low (open-drain)
Reset Delay	200ms typical
Operating Voltage	0.7V to 6.0V
Package	SOT-23-5
Operating Temp	-40°C to +85°C

Part Number Decoder

SGM800-2.93YN5G:

• SGM800 = Voltage detector family
• 2.93 = Detection threshold (2.93V)
• Y = Output configuration (active-low)
• N5 = SOT-23-5 package
• G = Green (halogen-free)

Key Features

Ultra-Low Power:

• 0.5 μA supply current
• 10-100× lower than competitors
• Extends battery life significantly

High Accuracy:

• ±1.5% detection threshold tolerance
• 2.93V ±44mV (2.886V to 2.974V)
• Reliable voltage monitoring

Built-in Delay:

• 200ms reset delay (typical)
• Prevents false resets during transients
• Ensures stable power before release

Wide Operating Range:

• 0.7V to 6.0V supply voltage
• Works below detection threshold
• Suitable for battery applications

---

Complete Specifications

Electrical Characteristics

Parameter	Min	Typ	Max	Unit
Detection Voltage (Vth)	2.886	2.93	2.974	V
Hysteresis	-	100	-	mV
Supply Current	-	0.5	1.0	μA
Output Voltage Low	-	-	0.3	V
Output Leakage	-	-	0.1	μA
Reset Timeout	140	200	280	ms

Operating Conditions

Parameter	Value
Supply Voltage (VDD)	0.7V to 6.0V
Operating Temperature	-40°C to +85°C
Storage Temperature	-65°C to +150°C

Pin Configuration (SOT-23-5)

Top View:

    VDD  1 ●─────● 5  RESET
         │       │
    GND  2 ●     │
         │       │
    NC   3 ●─────● 4  NC

Pin 1: VDD (Supply voltage)
Pin 2: GND (Ground)
Pin 3: NC (No connect)
Pin 4: NC (No connect)
Pin 5: RESET (Output, active-low)

---

Application Circuits

1. Basic Microcontroller Reset

Microcontroller Reset Circuit:

VDD (3.3V) ──┬─── MCU VDD
             │
             ├─── SGM800-2.93YN5G
             │    Pin 1 (VDD)
             │
            ═╪═ 0.1μF
             │
            GND ─── Pin 2 (GND)

Pin 5 (RESET) ───┬─── MCU RESET pin
                 │
                10kΩ
                 │
                VDD

Function: Holds MCU in reset until VDD > 2.93V + 200ms

Design Notes:

• Pull-up resistor (10kΩ typical) required for open-drain output
• Bypass capacitor (0.1μF) near VDD pin
• Reset released when VDD rises above 2.93V and stabilizes

2. Battery Low-Voltage Detection

Battery Monitor:

Battery ──┬─── SGM800-2.93YN5G (VDD)
          │
         ═╪═ 1μF
          │
         GND

RESET ───► Interrupt to MCU
           (Low battery warning)

Threshold: 2.93V
Hysteresis: 100mV
Action: MCU enters low-power mode

Application:

• Li-ion battery monitoring (single cell: 2.7-4.2V)
• Alert system before critical shutdown
• Graceful power-down sequence

3. Power Supply Supervision

3.3V Rail Monitoring:

3.3V Rail ──┬─── SGM800-2.93YN5G
            │
           ═╪═ 0.1μF
            │
           GND

RESET ──► System Enable/Disable

If 3.3V drops below 2.93V:
- RESET goes LOW
- Disable system operation
- Prevent data corruption

4. Multiple Voltage Supervision

Multi-Rail Monitoring:

VDD1 (3.3V) ──► SGM800-2.93YN5G ──► RESET1
VDD2 (3.3V) ──► SGM800-2.93YN5G ──► RESET2

Combined Reset:
RESET1 ──┬──┐
         │  OR gate ──► System RESET
RESET2 ──┘

Monitors multiple rails independently

---

Design Guidelines

Component Selection

Pull-up Resistor:

• Value: 10kΩ - 100kΩ
• Lower (10kΩ): Faster rise time, higher current
• Higher (100kΩ): Lower current, slower rise time
• Recommended: 47kΩ for balance

Bypass Capacitor:

• Value: 0.1μF ceramic
• Location: Within 5mm of VDD pin
• Type: X7R or X5R (stable)

PCB Layout

Placement:

• Place near power input
• Close to MCU reset pin
• Short traces minimize noise coupling

Routing:

• VDD trace: Wide, short, direct
• GND: Solid ground plane connection
• RESET: Keep away from noisy signals

Threshold Selection

SGM800 Family Voltages:

• Available: 1.5V to 5.0V (0.1V steps)
• SGM800-2.93YN5G: 2.93V threshold
• Select based on minimum operating voltage

For 3.3V Systems:

• Nominal: 3.3V
• Minimum: 2.97V (10% tolerance)
• 2.93V detector: Good margin (40mV below min)

---

Comparison and Selection

SGM800 Family

Part Number	Threshold	Output	Application
SGM800-1.8YN5G	1.8V	Active-low	1.8V systems
SGM800-2.5YN5G	2.5V	Active-low	2.5V systems
SGM800-2.93YN5G	2.93V	Active-low	3.3V systems
SGM800-3.08YN5G	3.08V	Active-low	3.3V (higher margin)
SGM800-4.63YN5G	4.63V	Active-low	5V systems

Competitive Alternatives

Manufacturer	Part Number	Threshold	Supply Current	Package
SGMICRO	SGM800-2.93YN5G	2.93V	0.5 μA	SOT-23-5
TI	TPS3809I25	2.93V	7 μA	SOT-23-3
Microchip	MCP130-300	2.93V	1 μA	SOT-23-3
Diodes Inc	APX809-29	2.93V	1 μA	SOT-23-3

SGM800-2.93YN5G Advantages:

• Ultra-low power (0.5 μA vs 1-7 μA)
• High accuracy (±1.5%)
• Cost-competitive
• Green packaging (halogen-free)

Conclusion

The SGM800-2.93YN5G delivers precision voltage supervision for 3.3V systems with industry-leading ultra-low power consumption (0.5 μA), high accuracy (±1.5%), and built-in 200ms reset delay in compact SOT-23-5 package. Ideal for battery-powered IoT devices, wearables, and portable instruments requiring reliable reset generation with minimal current drain.

Key Advantages:

✅ Ultra-Low Power: 0.5 μA extends battery life
✅ High Accuracy: ±1.5% threshold tolerance
✅ Built-in Delay: 200ms prevents false resets
✅ Wide Range: 0.7-6V operating voltage
✅ Compact: SOT-23-5 package
✅ Cost-Effective: Competitive alternative to TI/Microchip

Designing battery-powered systems? Visit AiChipLink.com for technical resources and power management design consultation.

Search SGM800-2.93YN5G Stock Now

 

 

 

 

 

Written by Jack Elliott from AIChipLink.

 

AIChipLink, one of the fastest-growing global independent electronic   components distributors in the world, offers millions of products from thousands of manufacturers, and many of our in-stock parts is available to ship same day.

 

We mainly source and distribute integrated circuit (IC) products of brands such as Broadcom, Microchip, Texas Instruments, Infineon, NXP, Analog Devices, Qualcomm, Intel, etc., which are widely used in communication & network, telecom, industrial control, new energy and automotive electronics. 

 

Empowered by AI, Linked to the Future. Get started on AIChipLink.com and submit your RFQ online today!