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Renesas ISL91132IIMZ-T
- Part No.:
- ISL91132IIMZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91132IIMZ-T.pdf
- Description:
- IC REG BOOST PROG 1.8A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,049
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Product details
Overview
ISL91132IIMZ-T from Renesas Electronics is a high-efficiency 1.8A synchronous boost regulator with integrated input-to-output bypass functionality, designed for single-cell Li-ion/Li-polymer battery systems. It delivers up to 1.8A at VIN = 2.5V/VOUT = 3.3V, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and operates across 2.35V–5.4V input range.
For engineers reviewing the ISL91132IIMZ-T datasheet, ISL91132IIMZ-T pinout, ISL91132IIMZ-T application, or ISL91132IIMZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves (up to 96%), real-world bypass mode behavior, and precise selection guidance for smartphone power rails, RF PA supplies, and USB OTG source design.
Technical Context
The ISL91132IIMZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDS(ON) = 45mΩ/40mΩ), 2.5MHz oscillator, and auto-compensated loop. It supports dual-mode operation: regulated boost (3.3V/3.5V fixed output) and low-dropout bypass via dedicated 38mΩ P-channel switch Q3.
Bypass activation is configurable-Auto Bypass triggers when VIN exceeds VOUT by ≥1.5% for 5µs; Forced Bypass activates on BYPS pin low, including controlled discharge if VOUT > VIN. Protection includes hiccup-mode overcurrent (16-cycle detection), thermal warning (120°C), shutdown (150°C), and undervoltage lockout (2.35V rising).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.35V to 5.4V - supports full Li-ion discharge curve (3.0–4.2V) plus USB 5V input without external LDO. |
| Max Output Current | 1.8A DC at VIN=2.5V/VOUT=3.3V - sufficient for 3G/4G RF power amplifier peak loads. |
| Bypass RDS(ON) | 38mΩ - enables <100mV dropout at 1.5A, critical for battery-to-load efficiency in portable devices. |
| Quiescent Current | 45µA in Forced Bypass mode - minimizes standby drain during system sleep states. |
| Switching Frequency | 2.5MHz (typ) - allows use of compact 0.47µH inductor and reduces EMI filtering burden. |
| Output Voltage Options | 3.3V / 3.5V (selected via VSEL pin) - matches common PMIC rail requirements for AP/RF subsystems. |
| Protection Features | Overcurrent (hiccup), overtemperature (150°C shutdown), UVLO, short-circuit - enables robust operation without external supervision circuitry. |
Pinout & Package
ISL91132IIMZ-T uses a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm WLCSP package (RoHS-compliant, MSL3). Pin layout follows standard top-view ball grid with dedicated PGND, GND, VIN, VOUT, LX, and control signal terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Accepts 2.35–5.4V; requires local 22µF ceramic capacitor to PGND for stability and transient response. |
| VOUT (B3, B4) | Regulated output | Delivers boosted or bypassed voltage; connects to 22µF output capacitor and load; dual-bump configuration lowers impedance. |
| LX (C3, C4) | Inductor switch node | Connects to 0.47µH inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| PGND (D2, D3, D4) | Power ground | High-current return path for LX and internal FETs; separate from analog GND to prevent noise coupling. |
| GND (B2, C2, D1) | Analog ground | Reference for error amplifier, bias circuits, and PG logic; must be tied to PGND at single point near IC. |
| EN (A1) | Enable control | Active-high logic input; pulls down to disable device and disconnect load (true shutdown with reverse leakage <1µA). |
| BYPS (C1) | Bypass mode select | Pull low for Forced Bypass (Q3 on, rest disabled); pull high for Auto Bypass (entry based on VIN–VOUT margin). |
| VSEL (A4) | Output voltage select | Logic-level input selecting 3.3V (low) or 3.5V (high) output in Boost mode; no effect in Bypass mode. |
| PG (A2) | Power-good flag | Open-drain output asserted high when VOUT is within ±4% regulation; deasserted during thermal warning (>120°C) or fault. |
Key Features
| Feature | Design Value |
|---|---|
| Input-to-output bypass with 38mΩ switch | Enables <100mV dropout at 1.5A, extending battery runtime in near-VIN-to-VOUT conditions (e.g., 3.8V battery → 3.7V rail). |
| 2.5MHz fixed-frequency PWM + PFM light-load mode | Reduces external component size while maintaining >85% efficiency down to 1mA load via burst-mode operation. |
| Dual soft-start profiles (fast/slow) | Supports fast startup for 3.3V/3.5V variants (600µs to regulation) and slower ramp for higher-output versions to limit inrush. |
| Integrated protection suite | Eliminates need for external OCP, OTP, and UVLO ICs-hiccup-mode current limiting, 150°C thermal shutdown, and 2.35V UVLO threshold are factory-trimmed. |
| Separate PGND and GND pins | Prevents switching noise from corrupting feedback and reference circuits, ensuring stable regulation under dynamic load steps. |
Applications
| Smartphone Power Rail | 4G LTE RF Power Amplifier |
|---|---|
Use Scenario: Supplies 3.5V to application processor I/O or display interface in ultra-thin smartphones with tight board space. IC Role / Device Role / Timing Role: Primary boost converter with seamless transition to bypass mode as battery voltage drops below 3.6V. Use Value: Maintains regulated 3.5V rail across full battery discharge (3.0–4.2V), avoiding brownouts during high-CPU activity. | Use Scenario: Powers 3.3V/3.5V RF PA stages in LTE handsets requiring fast transient response and low quiescent consumption. IC Role / Device Role / Timing Role: High-efficiency DC-DC supply with 2.5MHz switching enabling compact filter design and minimal PCB footprint. Use Value: Delivers 1.8A peak current with <96% efficiency at 1A, reducing thermal load on PA module and extending talk time. |
| USB OTG Power Source | Tablet PC Core Logic Supply |
Use Scenario: Provides 5V VBUS from 3.7V Li-ion battery in mobile OTG accessories (e.g., card readers, peripherals). IC Role / Device Role / Timing Role: Boost regulator configured for 5.0V output (via ISL91132IIQZ variant); ISL91132IIMZ-T supports lower-voltage OTG modes. Use Value: Meets USB 2.0 VBUS tolerance (4.75–5.25V) with ±4% output accuracy and fast load-step recovery (<100µs). | Use Scenario: Powers GPU or memory interface in 7–10 inch tablets where battery life and thermal management are critical. IC Role / Device Role / Timing Role: Dual-mode regulator operating in Boost during cold boot, switching to Bypass once battery reaches nominal voltage. Use Value: Reduces system power loss by 300mW at 1.2A compared to fixed-boost-only solutions, directly improving battery longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator with bypass applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.8A output capability but no integrated bypass FET; requires external MOSFET for low-dropout operation. | Suitable for higher-current designs where board space allows discrete bypass implementation. | Choose TPS61088RHLR only if >2A output or programmable VOUT is required; ISL91132IIMZ-T offers smaller solution size and simpler layout. |
| MAX8646ETA+ | Fixed 3.3V output only; no VSEL pin; 1.5A max output; lacks forced bypass control (auto-only). | Applicable in cost-sensitive designs with static 3.3V requirement and no need for 3.5V option or manual bypass override. | Select MAX8646ETA+ for legacy 3.3V-only systems; ISL91132IIMZ-T provides flexibility, higher current, and deterministic bypass control. |
Compared with TPS61088RHLR and MAX8646ETA+, the ISL91132IIMZ-T uniquely integrates a 38mΩ bypass FET with dual-mode control (forced/auto), supports two output voltages via VSEL, and achieves 1.8A output in a 1.78mm² WLCSP-enabling the smallest possible footprint for battery-powered RF and AP power rails.
Availability
ISL91132IIMZ-T is available at Aetrix Electronics and suitable for smartphone power rails, 4G RF amplifier supplies, and USB OTG source applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91132IIMZ-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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and consumer markets.
The ISL91132 product line targets portable battery-powered systems requiring high-efficiency, small-footprint DC-DC conversion with intelligent bypass capability-optimized for smartphones, tablets, and wireless infrastructure endpoints.
FAQ
What is the exact output voltage setting for ISL91132IIMZ-T?
The ISL91132IIMZ-T is factory-configured for dual-output options: 3.3V (low VSEL) or 3.5V (high VSEL) in Boost mode. The marking "132M" on the device confirms this variant. Bypass mode passes VIN directly to VOUT with 38mΩ resistance, so output equals input minus I×0.038V drop. This behavior is documented in the FN8637 datasheet Section "Ordering Information" and "Electrical Specifications".
Does ISL91132IIMZ-T support true load disconnect when disabled?
Yes, ISL91132IIMZ-T provides true load disconnect in shutdown: when EN is pulled low, both boost FETs (Q1/Q2) and bypass FET (Q3) are fully turned off, and reverse leakage from VOUT to VIN is limited to 0.3–1.0µA (per datasheet Table "LEAKAGE CURRENT"). This prevents battery drain through back-fed loads, a key requirement for always-on mobile subsystems.
How does the Auto Bypass mode trigger in ISL91132IIMZ-T?
Auto Bypass in ISL91132IIMZ-T activates when the BYPS pin is held high AND VIN exceeds the target VOUT by ≥1.5% for ≥5µs with no switching activity. This condition is monitored continuously during regulation. Once triggered, the boost controller halts and Q3 is enabled, reducing dropout to IOUT × 38mΩ. The behavior is confirmed in datasheet Section "Functional Description", Figure 18/19, and electrical specs for VBYP_Hys (100mV).
What inductor value and rating are required for ISL91132IIMZ-T?
ISL91132IIMZ-T requires a 0.47µH shielded ferrite inductor rated for ≥3A saturation current and low DCR (e.g., TDK TFM201610A or TOKO DFE201610R). This value is specified in the "Typical Application" (Figure 1), "Applications Information", and validated in efficiency curves (Figures 4–6). Using alternate values risks instability, reduced efficiency, or startup failure due to mismatched current limits.
Can ISL91132IIMZ-T operate with input voltage above 5.4V?
No, ISL91132IIMZ-T has an absolute maximum VIN rating of 6.5V, but recommended operating range is strictly 2.35V to 5.4V per datasheet "Recommended Operating Conditions". Exceeding 5.4V violates specification limits and may cause premature failure or untested behavior. For 5V-input systems, ensure upstream regulation or clamping maintains VIN ≤5.4V at the IC pin under all transients.
ISL91132IIMZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.35V
- Voltage - Input (Max):
- 5.4V
- Voltage - Output (Min/Fixed):
- 3.15V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 1.8A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (1.78x1.78)
ISL91132IIMZ-T FAQ
1.How can I place an order for ISL91132IIMZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91132IIMZ-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 ISL91132IIMZ-T reliable?
The price and inventory of ISL91132IIMZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91132IIMZ-T is usually 5 days.
3.What payment methods are accepted for ISL91132IIMZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91132IIMZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91132IIMZ-T?
ISL91132IIMZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91132IIMZ-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 ISL91132IIMZ-T?
For technical support, including ISL91132IIMZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91132IIMZ-T requirements.
6.How does Aetrix verify that ISL91132IIMZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91132IIMZ-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 ISL91132IIMZ-T meets industry standards.
7.What is the process for return or replacement of ISL91132IIMZ-T?
All ISL91132IIMZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91132IIMZ-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 ISL91132IIMZ-T part is unused and in its original packaging.
Return procedure for ISL91132IIMZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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