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SM5103 Li-ion to dry cell charge and discharge management IC
SM5103 Li-ion to dry cell charge and discharge management IC
Single-chip solution integrating linear charger & synchronous boost. 1A rate, 93% efficiency, 10μA standby.
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| Full Part Number | SM5103 (V42/V35 options) |
| Brand / Manufacturer | HICHON |
| Datasheet | Download |
| Package Type | DFN3X3-10 |
| MOQ / SPQ | Sample: 10 pcs | Production: 1 Reel (5,000 pcs) |
| Mounting Style | SMD/SMT |
| Input Voltage Range | VIN: 4.5V ~ 5.5V (Charge); Max 28V |
| Charge Current | 1A (configurable, RSET=1.2K) |
| Charge Voltage | 4.20V (Float Charging) |
| Quiescent Current | 6μA (No-load) |
| Peak Current | 4.0A (Cycle-by-Cycle Limit) |
| Efficiency | Up to 92% |
| Switching Frequency | 1MHz |
| Topology | Synchronous Buck |
| Drive Capability | 3A (Discharge) |
| Supply Voltage | 4.5V ~ 5.5V (VIN) |
| Operating Temperature | -40℃ ~ +85℃ |
| Semiconductor Material | Silicon |
| Battery Chemistry | Li-ion (3.7V) |
| Battery Cell Count | 1 |
| Protection Features | UVLO, SCP, OTP, NTC |
| Packaging | Tape / Reel |
| Battery Temperature Monitoring | Supported (NTC pin) |
| Working Mode | Buck DC/DC |
SM5103 is a dedicated lithium battery charge and discharge management IC.
During charging, it charges 3.7V lithium-ion batteries with a maximum configurable charging current of 1A, and supports an input voltage up to 28V.
In discharge mode, it adopts a synchronous buck converter with a 1MHz switching frequency, delivering discharge current up to 3A.
It integrates under-voltage protection, short-circuit protection, and thermal over-temperature protection circuits on chip.
SM5103 features ultra-low power consumption technology, with quiescent current under no-load condition as low as 6 μA.
SM5103 provides indicator signals for charging, full-charge, and short-circuit states.
The NTC function monitors battery temperature in real time to guarantee battery safety and reliability.
Download SM5103 Datasheet
Features
- Integrated charging and step-down discharge management
- Adjustable charging current up to 1A
- Integrated charging indicator
- Max input voltage is 28V
- High discharge current up to 3A
- No-load discharge current is only 6μA.
- Discharge efficiency up to 92%
- 1.5V outputs support series connection
- Built-in under-voltage protection
- Built-in short-circuit protection
- NTC pin for battery temperature monitoring
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Package: DFN3X3-10
Applications
Replaces traditional 1.5V dry cell
What is the Minimum Order Quantity (MOQ)?
What is the Minimum Order Quantity (MOQ)?
Standard MOQ is 1 Reel. Sample orders are accepted in smaller quantities. Please contact us for custom arrangements.
Are your products guaranteed authentic?
Are your products guaranteed authentic?
All products are genuine, factory-sourced components. Certificate of Analysis (COA) and Datasheet are available upon request. Third-party inspection can be arranged if needed.
What is your sample policy?
What is your sample policy?
Standard samples require a sample fee, which is deductible upon bulk order placement. Free evaluation samples are available for qualified companies. Shipping costs are covered by the buyer or charged to the buyer's courier account.
What payment methods are accepted?
What payment methods are accepted?
We accept T/T (Wire Transfer) with 80% deposit and balance before shipment, PayPal or credit card for small orders, and net terms for established customers upon approval.
What is the lead time?
What is the lead time?
In-stock items ship within 3–7 business days. Custom or bulk orders take 4–12 weeks depending on capacity and materials. Exact lead time will be confirmed upon order placement.
