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Renesas ISL9106IRZ-T
- Part No.:
- ISL9106IRZ-T
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL9106IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,015
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Product details
Overview
ISL9106IRZ-T from Intersil is a 1.2A, 1.6MHz synchronous buck regulator optimized for low-voltage microprocessor core power in space-constrained portable devices. It operates from 2.7V–5.5V input, delivers output down to 0.8V with ±3% accuracy, and achieves up to 95% efficiency using integrated P- and N-channel MOSFETs. Its 17µA quiescent current in Skip mode extends battery life in Li-ion-powered PDAs and cellular handsets.
For engineers reviewing the ISL9106IRZ-T datasheet, ISL9106IRZ-T pinout, ISL9106IRZ-T application, or ISL9106IRZ-T equivalent, key selection criteria include its 10-lead 3mm×3mm DFN package, selectable forced-PWM/Skip operation modes, 215ms Power-Good delay, internal soft-start, and discharge-on-shutdown functionality - all critical for compact, battery-sensitive power sequencing designs.
Technical Context
The ISL9106IRZ-T employs peak-current-mode PWM control with internal slope compensation for fast transient response and pulse-by-pulse current limiting. Its dual-MOSFET architecture integrates a 0.16Ω P-channel and 0.15Ω N-channel switch (at VIN = 2.7V), enabling high-efficiency regulation across load ranges.
Operation supports two distinct modes: forced PWM (MODE = SGND) maintains fixed 1.35–1.75MHz switching regardless of load; Skip mode (MODE = VIN) reduces switching frequency at light loads to sustain 17µA IQ and maximize light-load efficiency. The 215ms PG timer initiates only when output voltage enters the valid window (±8% of nominal) and resets on RSI high-to-low transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.2A guaranteed - supports DSP core and microprocessor loads without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li+ cell, three NiMH cells, or regulated 5V rails. |
| Feedback Voltage | 0.8V ±2% - enables precise output setting from 0.8V to 3.3V via external resistor divider. |
| Quiescent Current | 17µA typical in Skip mode - minimizes standby power loss in always-on portable systems. |
| Switching Frequency | 1.6MHz typical - allows use of small 2.2µH inductors and 10µF ceramic capacitors, reducing PCB area to <1cm². |
| Power-Good Delay | 215ms typical - provides reliable system reset timing after stable output is achieved. |
| Shutdown Current | <0.05µA typical - ensures near-zero battery drain during deep sleep or off-state. |
| Duty Cycle Max | 100% - enables ultra-low dropout operation when input approaches output voltage. |
Pinout & Package
ISL9106IRZ-T is housed in a RoHS-compliant 10-lead 3mm×3mm DFN package (PKG DWG L10.3x3C) with exposed thermal pad connected to PGND. The package height is 0.9mm typical, supporting ultra-thin portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 2.7–5.5V; requires 10µF ceramic decoupling to PGND for stability and EMI control. |
| NC | No-connect terminal | Unbonded pin; must remain unconnected per datasheet - no routing or grounding allowed. |
| EN | Enable control input | Active-high logic; asserts soft-start on high, discharges output capacitor on low - essential for power sequencing. |
| PG | Open-drain Power-Good output | 215ms delayed assertion when VOUT is within ±8% window; resets on RSI edge - used for system reset coordination. |
| MODE | Operating mode select | High/VIN = Skip mode (low IQ); low/SGND = forced PWM (fixed 1.6MHz) - determines light-load efficiency vs noise trade-off. |
| SW | Switching node | Connects to inductor; carries high di/dt pulses - requires short, wide trace and tight loop with PGND to minimize EMI. |
| PGND | Power ground return | Primary return path for high-current SW and VIN paths; must be star-connected to exposed pad and SGND at load point. |
| SGND | Analog ground reference | Reference for FB, RSI, MODE, EN; isolated from PGND except at single-point load connection to avoid noise coupling. |
| FB | Feedback voltage sense | Monitors output via resistor divider; 0.8V reference sets VOUT = 0.8V × (1 + R2/R3) - accuracy impacted by ≤0.1µA bias current. |
| RSI | Reset for Power-Good timer | High level forces PG low; falling edge restarts 215ms counter if VOUT is in valid window - enables synchronized system initialization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | P- and N-channel MOSFETs with 0.16Ω/0.15Ω ON-resistance (VIN=2.7V) eliminate external switches and reduce BOM count. |
| Discharge-on-shutdown | Internal path actively discharges output capacitor when EN is low - prevents residual voltage from interfering with downstream logic states. |
| Internal digital soft-start | 1.1ms controlled ramp limits inrush current and prevents output overshoot during startup - no external capacitor required. |
| Overcurrent & thermal protection | Peak current limit (2.0A typ) and thermal shutdown at 150°C with 25°C hysteresis ensure robust fault recovery in sustained overload. |
| Low-dropout 100% duty cycle | Enables regulation down to VIN ≈ VOUT + IOUT × RDS(ON)_PCH - extends usable battery range in Li-ion applications. |
| RoHS-compliant packaging | 10-lead 3×3mm DFN with matte tin termination and Pb-free anneal process - compatible with SnPb and lead-free reflow profiles. |
Applications
| Mobile Handset Core Power | DSP Processor Supply |
|---|---|
|
Use Scenario: Powering ARM-based application processors in 3G/4G smartphones requiring dynamic voltage scaling and rapid load transients. IC Role / Device Role / Timing Role: Primary core voltage regulator delivering 1.2V/1.2A with 215ms PG assertion for SoC boot coordination. Use Value: 17µA Skip-mode IQ extends standby time; 1.6MHz switching enables compact 2.2µH/10µF filter design fitting tight board real estate. |
Use Scenario: Supplying fixed 1.8V or 2.5V to digital signal processors in portable medical instruments and audio codecs. IC Role / Device Role / Timing Role: High-accuracy (±3%) synchronous buck converter with internal soft-start ensuring clean power-up without logic glitches. Use Value: Integrated MOSFETs and 0.8V FB reference simplify layout; discharge-on-shutdown prevents back-powering of sensitive analog sections. |
| PDA System-on-Chip Rail | Li-ion Powered Industrial Sensor Node |
|
Use Scenario: Generating 3.3V main I/O rail in palm-sized PDAs with multi-cell battery input and strict EMI limits. IC Role / Device Role / Timing Role: Efficient step-down regulator operating from 4.2V battery; uses forced PWM mode to suppress audible noise in quiet environments. Use Value: 95% peak efficiency reduces thermal load; 10-lead DFN package with exposed pad enables effective heat dissipation in sealed enclosures. |
Use Scenario: Providing regulated 1.5V supply to ultra-low-power microcontrollers and RF transceivers in battery-operated IoT sensor nodes. IC Role / Device Role / Timing Role: Low-quiescent buck regulator with programmable PG delay for wake-up synchronization and brown-out detection. Use Value: 0.05µA shutdown current preserves multi-year battery life; RSI pin allows host MCU to reset PG timer before entering deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.8MHz fixed-frequency, 0.6V FB reference, 25µA IQ in PFM mode, 6-pin WSON package | Lacks PG, RSI, and discharge-on-shutdown; smaller package but no mode-select flexibility | Choose when minimal footprint and higher switching frequency outweigh need for power sequencing features. |
| RT8059NGQW | 1.5MHz, 0.6V FB, 22µA IQ in auto-PFM, 10-pin QFN with thermal pad, no RSI or discharge path | Missing PG delay timer and output discharge function; different pinout and FB voltage | Select for cost-sensitive designs where basic regulation suffices and external discharge circuitry is acceptable. |
Compared with TPS62231DRVR and RT8059NGQW, the ISL9106IRZ-T uniquely combines 215ms programmable PG timing, RSI-controlled reset, and active output discharge - making it superior for tightly coordinated power-up sequences in portable SoC platforms where reliability and state integrity are critical.
Availability
ISL9106IRZ-T is available at Aetrix Electronics and suitable for mobile handset core power, DSP processor supply, PDA SoC rails, and Li-ion powered industrial sensor nodes requiring stable component supply across production lifecycles.
Supply support for ISL9106IRZ-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil Corporation, now part of Renesas Electronics, designs high-performance analog and power management ICs for demanding portable, industrial, and communications applications.
The ISL9106IRZ-T belongs to Intersil's low-IQ synchronous buck regulator product line, engineered specifically for battery-powered handheld devices requiring high efficiency at light loads and robust power sequencing capabilities.
FAQ
What is the maximum output current capability of the ISL9106IRZ-T?
The ISL9106IRZ-T guarantees 1.2A continuous output current across the full operating temperature range (-40°C to +85°C). This rating is supported by internal peak current limiting set to 2.0A typical and thermal shutdown at 150°C, allowing sustained delivery under typical PCB thermal conditions with proper layout and copper pour on the exposed pad.
How does the MODE pin affect efficiency and noise performance in the ISL9106IRZ-T?
When MODE is tied to VIN, the ISL9106IRZ-T enters Skip mode below ~100mA load, reducing switching frequency and cutting quiescent current to 17µA - maximizing battery life but increasing output ripple. When MODE is grounded, it forces fixed 1.6MHz PWM operation, maintaining low ripple and predictable EMI spectrum at the expense of higher light-load IQ (5mA typical).
Does the ISL9106IRZ-T provide output capacitor discharge during shutdown?
Yes, the ISL9106IRZ-T actively discharges the output capacitor when the EN pin is driven low. This internal discharge path prevents residual voltage from holding downstream logic in undefined states, which is essential for reliable power sequencing in multi-rail portable systems - a feature not present in many competing buck regulators.
What is the purpose and behavior of the RSI pin on the ISL9106IRZ-T?
The RSI (Reset Signal Input) pin on the ISL9106IRZ-T resets the internal 215ms Power-Good timer. When RSI is high, PG remains low regardless of output voltage. A high-to-low transition restarts the timer only if VOUT is within the valid window (89.5–113.2% of nominal); otherwise, the timer waits until regulation is achieved before starting - enabling precise system-level reset coordination.
Can the ISL9106IRZ-T operate with an input voltage below 2.7V?
No - the ISL9106IRZ-T has a guaranteed undervoltage lockout (UVLO) threshold of 2.5V (typical rising), with hysteresis ensuring disable below ~2.4V. Operation below 2.7V violates the recommended operating condition and may result in unstable regulation, premature shutdown, or failure to initiate soft-start; it is not characterized or warranted for sub-2.7V input.
ISL9106IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL9106IRZ-T FAQ
1.How can I place an order for ISL9106IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9106IRZ-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL9106IRZ-T reliable?
The price and inventory of ISL9106IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9106IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL9106IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9106IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9106IRZ-T?
ISL9106IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9106IRZ-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL9106IRZ-T?
For technical support, including ISL9106IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9106IRZ-T requirements.
6.How does Aetrix verify that ISL9106IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9106IRZ-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL9106IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL9106IRZ-T?
All ISL9106IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9106IRZ-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL9106IRZ-T part is unused and in its original packaging.
Return procedure for ISL9106IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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