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Renesas ISL9203CRZ-TR5220
- Part No.:
- ISL9203CRZ-TR5220
- Manufacturer:
- Renesas
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL9203CRZ-TR5220.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,627
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Product details
Overview
ISL9203CRZ-TR5220 from Intersil is a single-cell Li-ion/Li-polymer linear battery charger IC with integrated pass MOSFET and current sensing, programmable charge current up to 1.0 A (typical, RIREF = 80 kΩ), ±1% voltage regulation accuracy at 4.20 V, and thermal foldback activation at 100°C - designed for space-constrained handheld medical devices and USB-powered chargers.
For engineers reviewing the ISL9203CRZ-TR5220 datasheet, ISL9203CRZ-TR5220 pinout, ISL9203CRZ-TR5220 application, or ISL9203CRZ-TR5220 equivalent, key selection considerations include its dual-mode operation (voltage-source vs. current-limited adapter), 2.8 V bias output for NTC circuits, open-drain STATUS signaling, and thermally enhanced 3×3 mm DFN package with exposed pad.
Technical Context
The ISL9203CRZ-TR5220 implements a CC/CV charging profile using an internal current mirror (100,000:1 ratio) between sense and main MOSFETs, with IREF pin regulating a 0.8 V reference to set charge current. Its thermal foldback reduces current at 100 mA/°C above 100°C junction temperature, preventing overheating on compact PCBs.
It features adaptive operation: as a linear regulator with voltage-source adapters (e.g., 5 V wall adapters), and as a quasi-switching device with current-limited adapters - where the main MOSFET saturates to minimize RDS(ON)-based dissipation during constant-current phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage Accuracy | ±1% (4.158–4.242 V) - ensures safe full-charge termination within Li-ion cell voltage limits. |
| Max Charge Current | 1.0 A typical (RIREF = 80 kΩ) - supports fast charging of 1,000–2,000 mAh batteries in <3 hours. |
| Input Voltage Range | 4.3–6.5 V operating; starts up down to 2.65 V falling threshold - compatible with low-headroom current-limited adapters. |
| Thermal Foldback Threshold | 100°C ±15% - activates automatic current reduction before junction exceeds 150°C absolute max. |
| V2P8 Output | 2.8 V ±0.1 V, 2 mA capable - provides stable bias for external thermistor networks or power-good indication. |
| STATUS Output Type | Open-drain, logic-low during charge - enables flexible pull-up to VIN or V2P8 without battery leakage paths. |
| Ambient Temp Range | −20°C to +70°C - validated for industrial handheld and portable medical equipment environments. |
Pinout & Package
ISL9203CRZ-TR5220 is housed in a thermally enhanced 10-lead 3×3 mm DFN package (L10.3x3) with exposed metal pad for PCB-level heat sinking. Pin 2 (NC) must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Input power supply | Accepts 4.3–6.5 V adapter input; POR rising threshold at 3.4 V enables startup from weak sources. |
| NC (2) | No connection | Unbonded pin - must be left floating per datasheet; not usable for routing or thermal relief. |
| STATUS (3) | Open-drain charge status indicator | Pulled LOW during active charge; high-impedance latched HIGH at EOC until recharge or EN toggle. |
| TIME (4) | Oscillator timing node | Connects to CTIME capacitor (e.g., 1 nF → 0.2 ms period) for internal timing and trickle-mode verification. |
| GND (5) | Power and signal reference | Must connect directly to low-impedance system ground plane; ties to exposed pad for thermal conduction. |
| EN (6) | Enable control input | Logic HIGH (≥2.0 V) or floating enables charge; pulled LOW disables with <30 µA standby current. |
| V2P8 (7) | 2.8 V reference output | Indicates adapter presence; powers external circuits (max 2 mA); disabled during shutdown. |
| IREF (8) | Charge current programming node | Maintains 0.8 V; sets ICHARGE = 105 × (0.8 V / RIREF) - e.g., 80 kΩ → 1.0 A typical. |
| VSEN (9) | Remote battery voltage sense | Connects near battery pack (+) terminal to compensate for PCB trace IR drop; floating forces trickle mode. |
| VBAT (10) | Battery connection | Drives single-cell Li-ion/Li-Po; requires 0.1 µF ceramic cap when battery attached; 10 µF tantalum if unpopulated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass element & current sensor | Eliminates external MOSFET, sense resistor, and blocking diode - reduces BOM count and layout area by ≥4 components. |
| Programmable CC/CV charging | Full 1.0 A charge current set via single resistor (RIREF); 4.20 V CV threshold accurate to ±1% across temp and line. |
| Charge current thermal foldback | Automatically scales current down at 100 mA/°C above 100°C - enables reliable operation on 2-layer PCBs without heatsinks. |
| Adapter-agnostic operation | Works with both voltage-source (e.g., 5 V USB) and current-limited adapters - avoids thermal runaway in low-cost power supplies. |
| Preconditioning for over-discharged cells | Applies 10% of programmed current (e.g., 100 mA for 1 A config) until VBAT > 2.8 V - prevents lithium plating on deeply discharged cells. |
Applications
| Medical Handheld Devices | USB Bus-Powered Chargers |
|---|---|
|
Use Scenario: Portable ultrasound or glucose monitors requiring safe, compact battery charging with NTC-based temperature monitoring. IC Role / Device Role / Timing Role: Single-cell Li-ion charger with integrated 2.8 V bias rail for NTC circuit and open-drain STATUS for MCU interrupt signaling. Use Value: Enables direct integration of thermal safety without external regulators or level shifters - reduces footprint by >25 mm² vs. discrete solutions. |
Use Scenario: Compact desktop or travel USB chargers delivering regulated 5 V input to charge embedded batteries. IC Role / Device Role / Timing Role: Linear charger IC operating in current-limited mode to minimize thermal stress when powered from USB 2.0 ports (500 mA max). Use Value: Eliminates need for external current-limiting circuitry while maintaining ≤1.0 A charge rate - simplifies compliance with USB power delivery constraints. |
| Smartphone Peripheral Accessories | Self-Charging Battery Packs |
|
Use Scenario: Bluetooth headsets or smart pens with replaceable Li-ion cells needing autonomous charge management. IC Role / Device Role / Timing Role: Standalone charger managing CC/CV profile, end-of-charge detection, and recharge initiation at 4.00 V threshold. Use Value: Provides full charge control with only 3 external components (RIREF, CTIME, input cap) - cuts bill-of-materials to 6 items total. |
Use Scenario: External power banks or battery grips that recharge internally while powering host devices. IC Role / Device Role / Timing Role: Primary charging controller interfacing with host system via STATUS and V2P8 for adapter presence and charge state reporting. Use Value: Delivers 1.0 A charge current with <3.0 µA standby draw from battery when adapter removed - extends shelf life >12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-cell Li-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1555 | Fixed 500 mA charge current; no IREF programming; 4.2 V ±0.5% accuracy; no V2P8 output. | Lacks programmability and adapter-flexible operation - suitable only for cost-sensitive, fixed-rate designs. | Select MAX1555 only if charge current and voltage tolerance requirements are relaxed and V2P8 bias is unnecessary. |
| BQ24040 | 1.0 A programmable current; 4.2 V ±0.5% accuracy; integrated LDO for VBUS path; no thermal foldback. | Includes power-path management but lacks thermal foldback - requires larger PCB copper area for thermal handling. | Choose BQ24040 when system needs simultaneous battery charging and system load powering, and thermal margin allows. |
Compared with MAX1555 and BQ24040, ISL9203CRZ-TR5220 uniquely combines programmable current, ±1% voltage accuracy, thermal foldback, and a dedicated 2.8 V bias rail - making it optimal for thermally constrained, adapter-flexible, and NTC-integrated portable medical designs.
Availability
ISL9203CRZ-TR5220 is available at Aetrix Electronics and suitable for medical handheld devices, USB bus-powered chargers, and self-charging battery packs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9203CRZ-TR5220 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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, computing, and portable applications.
The ISL9203 family was designed specifically for compact, thermally sensitive Li-ion charging applications - emphasizing integration, thermal resilience, and adapter interoperability in handheld and medical electronics.
FAQ
What is the maximum charge current supported by the ISL9203CRZ-TR5220?
The ISL9203CRZ-TR5220 supports a maximum typical charge current of 1.0 A when configured with an 80 kΩ resistor on the IREF pin. This value is confirmed in the Electrical Specifications table (page 2 of FN9242 Rev 1.00) under "Constant Charge Current" with RIREF = 80 kΩ and VBAT = 3.7 V. The absolute maximum rated charge current is 1.6 A per Absolute Maximum Ratings, but sustained operation above 1.0 A is limited by thermal foldback and package dissipation capability.
Does the ISL9203CRZ-TR5220 require an external blocking diode?
No, the ISL9203CRZ-TR5220 does not require an external blocking diode. As stated in the Features section (page 1), it integrates the pass element and current sensor, and explicitly lists "No External Blocking Diode Required" as a key capability. The internal architecture prevents reverse current flow from battery to input, eliminating diode forward-voltage loss and associated heat generation.
How does the thermal foldback function operate in the ISL9203CRZ-TR5220?
The ISL9203CRZ-TR5220 activates thermal foldback when its junction temperature reaches approximately 100°C (guaranteed ±15%). Above this threshold, the charge current decreases linearly at 100 mA/°C - for example, at 105°C, current drops to ~500 mA if initially set to 1.0 A. This behavior is verified in Figure 21 (page 12) and specified in Notes 4 and 5 of the Electrical Specifications. It ensures safe operation without external thermal sensors or PCB redesign.
Can the ISL9203CRZ-TR5220 operate with a USB 2.0 port as its input source?
Yes, the ISL9203CRZ-TR5220 can operate with a standard USB 2.0 port (5 V, 500 mA current-limited). Its dual-mode architecture allows it to function efficiently with current-limited adapters: the main MOSFET saturates during CC mode, minimizing power dissipation. The falling VIN threshold of 2.65 V (page 2) and guaranteed operation down to VIN = 2.65 V after startup ensure robustness even under USB port voltage droop.
What is the purpose of the V2P8 pin on the ISL9203CRZ-TR5220?
The V2P8 pin on the ISL9203CRZ-TR5220 delivers a regulated 2.8 V ±0.1 V output capable of sourcing up to 2 mA. Per the Pin Descriptions (page 6), it serves two primary functions: (1) indicating adapter presence (active only when VIN exceeds POR threshold), and (2) providing bias voltage for external circuits such as NTC thermistor networks. It is disabled during shutdown (EN = LOW) and is not intended as a general-purpose LDO.
ISL9203CRZ-TR5220 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- 1.5A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6.5V
- Interface:
- -
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL9203CRZ-TR5220 FAQ
1.How can I place an order for ISL9203CRZ-TR5220 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9203CRZ-TR5220 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 ISL9203CRZ-TR5220 reliable?
The price and inventory of ISL9203CRZ-TR5220 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9203CRZ-TR5220 is usually 5 days.
3.What payment methods are accepted for ISL9203CRZ-TR5220?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9203CRZ-TR5220 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9203CRZ-TR5220?
ISL9203CRZ-TR5220 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9203CRZ-TR5220 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 ISL9203CRZ-TR5220?
For technical support, including ISL9203CRZ-TR5220 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9203CRZ-TR5220 requirements.
6.How does Aetrix verify that ISL9203CRZ-TR5220 is sourced from the original manufacturer or authorized distributors?
All ISL9203CRZ-TR5220 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 ISL9203CRZ-TR5220 meets industry standards.
7.What is the process for return or replacement of ISL9203CRZ-TR5220?
All ISL9203CRZ-TR5220 units undergo pre-shipment inspection (PSI). If there is an issue with ISL9203CRZ-TR5220, 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 ISL9203CRZ-TR5220 part is unused and in its original packaging.
Return procedure for ISL9203CRZ-TR5220:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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