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kP52221XB
kP52221XB A 4.5V to 17V input, 2A output, 1200kHz synchronous buck converter in a SOT23-6 package. The KP522211B/18B is a simple, easy-to-use, and highly integrated synchronous buck converter. It features a wide input voltage range of 4.5V to 17V, making it ideal for various common input voltage rails such as 12V and 15V. It supports a continuous output current of up to 2A, with an output voltage range of 0.6V to 7V. The KP522211B operates in Pulse Frequency Modulation (PFM) mode under light load to maintain high light-load efficiency; the KP522218B operates in Forced Pulse Width Modulation (FPWM) mode to achieve a fixed switching frequency and low output ripple under full-load current. The KP522211B/18B integrates comprehensive protection features, including Under Voltage Lockout (UVLO), Cycle-by-Cycle Current Limiting (OCL), Undervoltage Protection with Hiccup (UVP), Overvoltage Protection (OVP), and Over Temperature Protection (OTP), to ensure safe and reliable operation under various working conditions. The KP522211B/18B is available in a small SOT23-6 package and operates over a junction temperature range of -40℃ to 125℃.
Category：
- Product Description
-
- Commodity name: kP52221XB
- 封装: SOT23-6
- 品牌: Biyi Microelectronics
kP52221XB A 4.5V to 17V input, 2A output, 1200kHz synchronous buck converter in a SOT23-6 package. The KP522211B/18B is a simple, easy-to-use, and highly integrated synchronous buck converter. It features a wide input voltage range of 4.5V to 17V, making it ideal for various common input voltage rails such as 12V and 15V. It supports a continuous output current of up to 2A, with an output voltage range of 0.6V to 7V. The KP522211B operates in Pulse Frequency Modulation (PFM) mode under light load to maintain high light-load efficiency; the KP522218B operates in Forced Pulse Width Modulation (FPWM) mode to achieve a fixed switching frequency and low output ripple under full-load current. The KP522211B/18B integrates comprehensive protection features, including Under Voltage Lockout (UVLO), Cycle-by-Cycle Current Limiting (OCL), Undervoltage Protection with Hiccup (UVP), Overvoltage Protection (OVP), and Over Temperature Protection (OTP), to ensure safe and reliable operation under various working conditions. The KP522211B/18B is available in a small SOT23-6 package and operates over a junction temperature range of -40℃ to 125℃.
Main Features
• Wide input voltage range: 4.5V to 17V
• Output voltage range: 0.6V to 7V
• Supports 2A continuous output current
• Switching frequency of 1200kHz in continuous inductor current mode
• Integrated low on-resistance MOSFET switches
• Low quiescent current: 190μA (no switching action, typical value)
• Low shutdown current: 2.5μA (typical value)
• Uses constant on-time control for ultra-fast dynamic response
• Two light-load operating modes:
• KP522211B: Pulse Frequency Modulation (PFM)
• KP522218B: Forced Pulse Width Modulation (FPWM)
• High reference voltage accuracy: 0.6V ±1.5% @25℃
• Integrated comprehensive protection functions:
• Precise enable control and adjustable undervoltage lockout function
• Internal 0.8ms soft-start time to avoid overvoltage and overcurrent
• Cycle-by-cycle peak current limiting (OCL)
• Non-latching input undervoltage protection (UVLO), output undervoltage protection (UVP), output overvoltage protection (OVP), and overtemperature protection (OTP)
• Compact solution size:
• Supports the use of MLCC ceramic capacitors and supports a low number of output capacitors
• No external compensation required
• Small package type: SOT23-6
Product Model
Input Voltage
Range(V)
Output Voltage
Range(V)
Operating Frequency (kHz)
Output Current(A)
Reference Voltage(V)
Control Mode
Operating Mode
Features
Package
KP522211B/18B
4.5~17
0.6~7
1200
2
0.6±1.5%
PFM/FPWM
Ultra-fast transient response,
High frequency
SOT23-6
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