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AD8436BRQZ
Electronics Part Number
AD8436BRQZ-WXManufacturer
Microchip Technology
AD8436BRQZ
Description
RMS-to-DC Conversion IC, QSOP-20Inventory
151 Pcs New Original In Stock
RMS-to-DC in QSOP-20; accurate average/true RMS conversion, robust temp performance, and low cost for large-volume meters.
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Minimum 1
Minimum 1
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Basic cost: USD 70.00
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Shipped from Hong Kong via FedEx/DHL/UPS/TNT
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In-stock items: Ready to ship in 1-2 days
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Technical Specifications
Category
Power Management (PMIC), LED Drivers
Manufacturer
Microchip Technology
Packaging
Tape & Reel (TR)
Operating Temperature
-40°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
SOT-23-5 Thin, TSOT-23-5
Series
-
Base Product Number
MIC2291
Product Status
Active
Type
DC DC Regulator
Internal Switch(s)
Yes
Number of Outputs
1
Applications
Camera Flash
Topology
Step-Up (Boost)
Voltage - Output
-
Dimming
Analog, PWM
Frequency
1.2MHz
Supplier Device Package
TSOT-23-5
Current - Output / Channel
1.2A (Switch)
Voltage - Supply (Min)
2.5V
Voltage - Supply (Max)
10V
Data Sheet Document (D)
Datasheets
Download MIC2291YD5-TR Product Specification (PDF)
HTML Datasheet
MIC2291YD5-TR-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
MIC2291YD5TR 576-1077-2 576-1077-1 576-1077-6 MIC2291YD5 TR
Standard Package
3,000
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Frequently Asked Questions (FAQ)
How does the MIC2291YD5-TR perform in low-voltage battery-powered camera flash applications when inp
The MIC2291YD5-TR maintains reliable boost operation down to 2.5V input, making it suitable for single-cell Li-ion or dual alkaline battery systems. However, as voltage drops near the minimum threshold, headroom for driving high-current white LEDs decreases, potentially limiting peak flash brightness. To mitigate performance loss, ensure input traces are short and low-impedance, and use a low-ESR ceramic input capacitor (e.g., 10µF X5R). Additionally, monitor inductor saturation current under cold-temperature conditions where battery voltage sags more under load, which could cause cycle-by-cycle current limiting and thermal stress over prolonged use.
Can the MIC2291YD5-TR safely replace the MAX16810 in a high-temperature camera flash design without
While both the MIC2291YD5-TR and MAX16810 target camera flash applications, the MIC2291YD5-TR has a higher maximum junction temperature (125°C vs. MAX16810's 150°C), demanding careful thermal management in enclosed or high-ambient environments. The TSOT-23-5 package has limited heat dissipation, so replacing MAX16810 with MIC2291YD5-TR may require board-level derating—reduce duty cycle or peak current if ambient exceeds 85°C. Use 2–4 thermal vias under the exposed pad (if layout-modified) and avoid adjacent heat sources to maintain reliability. Always verify thermal performance with IR imaging under worst-case pulsing conditions.
What design considerations are critical when using the MIC2291YD5-TR in PWM dimming mode to prevent
Fast PWM switching into the MIC2291YD5-TR’s EN/SET pin can induce LED current overshoot due to delayed regulation loop response at 1.2MHz switching frequency. To prevent transient overcurrent that risks LED degradation, limit PWM frequency to ≤1kHz and ensure clean, slow-fall input signals with series RC filtering (e.g., 1kΩ + 100pF). Use a pull-down resistor (100kΩ) on EN/SET to ensure off-state stability. Additionally, verify stability with the selected output capacitor—avoid excessively low ESR ceramics without sufficient feedback damping, which can cause sub-harmonic oscillations during analog-to-PWM transitions.
How does the internal 1.2A switch in the MIC2291YD5-TR impact inductor selection for maximizing effi
The MIC2291YD5-TR’s 1.2A internal switch necessitates an inductor rated for at least 1.5A saturation current to avoid core saturation under peak loads, especially during short flashes. Choose a low-profile shielded inductor (e.g., 4.7µH to 10µH) with DCR <100mΩ such as the Bourns SRP3215 or Taiyo Yuden MHB1608. Higher inductance improves efficiency at low loads but slows transient response; for flash applications with rapid on/off cycles, 6.8µH offers a good balance. Minimize PCB loop area between the inductor, switch node, and input capacitor to reduce EMI and resistive losses that degrade system efficiency.
Is the MIC2291YD5-TR susceptible to false triggering in noisy automotive cabin environments, and how
Yes, the MIC2291YD5-TR’s high-speed 1.2MHz operation and sensitivity on the EN/SET pin can make it vulnerable to EMI in automotive infotainment systems, potentially causing unintended flash activation. To minimize noise coupling, route the EN/SET trace away from switching nodes and clock lines, and guard it with grounded copper pour. Use a local 0.1µF ceramic capacitor at the IN pin and keep the feedback path (FB to LED cathode) as short as possible. For added immunity, place a small RC filter (10kΩ + 1nF) on the EN/SET line and ensure solid ground plane continuity beneath the TSOT-23-5 footprint. Avoid sharing ground returns with high-current loads like motors or RF transmitters.
How does the MIC2291YD5-TR perform in low-voltage battery-powered camera flash applications when inp
The MIC2291YD5-TR maintains reliable boost operation down to 2.5V input, making it suitable for single-cell Li-ion or dual alkaline battery systems. However, as voltage drops near the minimum threshold, headroom for driving high-current white LEDs decreases, potentially limiting peak flash brightness. To mitigate performance loss, ensure input traces are short and low-impedance, and use a low-ESR ceramic input capacitor (e.g., 10µF X5R). Additionally, monitor inductor saturation current under cold-temperature conditions where battery voltage sags more under load, which could cause cycle-by-cycle current limiting and thermal stress over prolonged use.
Can the MIC2291YD5-TR safely replace the MAX16810 in a high-temperature camera flash design without
While both the MIC2291YD5-TR and MAX16810 target camera flash applications, the MIC2291YD5-TR has a higher maximum junction temperature (125°C vs. MAX16810's 150°C), demanding careful thermal management in enclosed or high-ambient environments. The TSOT-23-5 package has limited heat dissipation, so replacing MAX16810 with MIC2291YD5-TR may require board-level derating—reduce duty cycle or peak current if ambient exceeds 85°C. Use 2–4 thermal vias under the exposed pad (if layout-modified) and avoid adjacent heat sources to maintain reliability. Always verify thermal performance with IR imaging under worst-case pulsing conditions.
What design considerations are critical when using the MIC2291YD5-TR in PWM dimming mode to prevent
Fast PWM switching into the MIC2291YD5-TR’s EN/SET pin can induce LED current overshoot due to delayed regulation loop response at 1.2MHz switching frequency. To prevent transient overcurrent that risks LED degradation, limit PWM frequency to ≤1kHz and ensure clean, slow-fall input signals with series RC filtering (e.g., 1kΩ + 100pF). Use a pull-down resistor (100kΩ) on EN/SET to ensure off-state stability. Additionally, verify stability with the selected output capacitor—avoid excessively low ESR ceramics without sufficient feedback damping, which can cause sub-harmonic oscillations during analog-to-PWM transitions.
How does the internal 1.2A switch in the MIC2291YD5-TR impact inductor selection for maximizing effi
The MIC2291YD5-TR’s 1.2A internal switch necessitates an inductor rated for at least 1.5A saturation current to avoid core saturation under peak loads, especially during short flashes. Choose a low-profile shielded inductor (e.g., 4.7µH to 10µH) with DCR <100mΩ such as the Bourns SRP3215 or Taiyo Yuden MHB1608. Higher inductance improves efficiency at low loads but slows transient response; for flash applications with rapid on/off cycles, 6.8µH offers a good balance. Minimize PCB loop area between the inductor, switch node, and input capacitor to reduce EMI and resistive losses that degrade system efficiency.
Is the MIC2291YD5-TR susceptible to false triggering in noisy automotive cabin environments, and how
Yes, the MIC2291YD5-TR’s high-speed 1.2MHz operation and sensitivity on the EN/SET pin can make it vulnerable to EMI in automotive infotainment systems, potentially causing unintended flash activation. To minimize noise coupling, route the EN/SET trace away from switching nodes and clock lines, and guard it with grounded copper pour. Use a local 0.1µF ceramic capacitor at the IN pin and keep the feedback path (FB to LED cathode) as short as possible. For added immunity, place a small RC filter (10kΩ + 1nF) on the EN/SET line and ensure solid ground plane continuity beneath the TSOT-23-5 footprint. Avoid sharing ground returns with high-current loads like motors or RF transmitters.
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Sep 15 2026
