Current Mode Buck-Boost Converter

RT6150A/RT6150B

The RT6150A/B is a high efficiency, fixed frequency, Buck-Boost DC-DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multi-cell alkaline or Ni-MH battery applications where the output voltage is within the battery voltage range. The device includes two N-MOSFET switches and two P-MOSFET switches for high efficiency operation. Switching frequency is set at 1MHz to reduce the external component size. Quiescent current is only 60μA in Power Save Mode (PSM), maximizing battery life in portable applications. PSM operation is user controlled and can be enabled by driving the PS pin low. If the PS pin is driven high, then fixed frequency switching is enabled.

Other features include low shutdown current, internal soft-start control, thermal shutdown protection and current limit. The RT6150A is available in the WDFN-10L 3x3 package and the RT6150B is available in the WDFN-10L 2.5x2.5 package.

Applications

Portable Products
Handheld Instrumentation

Key Spec.

	RT6150A	RT6150B
Status	Active	Active
Vin (min) (V)	1.8	1.8
Vin (max) (V)	5.5	5.5
Vout (min) (V)	2.5	2.5
Vout (max) (V)	5.5	5.5
Iout (max) (A)	0.8	0.8
Current Limit (typ) (A)	1.6	1.6
Freq (typ) (kHz)	1000	1000
Freq (min) (kHz)	800	800
Freq (max) (kHz)	1200	1200
Ron_HS (typ) (mOhm)	150	150
Ron_LS (typ) (mOhm)	150	150
Iq (typ) (mA)	0.06	0.06
Features	Current Mode Control;Enable Input;Internal Compensation;OCP	Current Mode Control;Enable Input;Internal Compensation;OCP
Package Type	WDFN3x3-10	WDFN2.5x2.5-10