Datasheet One Package Regulator Series 0.65A Output, Fully Integrated, Step-down Switching Power Supply Module BZ6Axx06GM Series General Description Applications Tne BZ6Axx06GM is a fully integrated power supply Smart Phones, Cell phones, Portable applications, module that is useful for shortening the product at the POL applications, RF applications, design period and shortening the product launch time for and USB Line Application electronics product, communication of portable it, and various applications industrial etc. Package(s) W(Typ.) x D(Typ.) x H(Max.) BZ6Axx06GM is based on a high efficiency 6MHz BGA-MD 2.90mm x 2.30mm x 1.00mm synchronous step-down switching regulator. It provides up to 0.65A load current and an input voltage range from 2.3V to 5.5V, optimized for battery powered portable applications. BZ6Axx06GM has a mode control pin that allows the user to select Forced PWM(Pulse Width Modulation) mode or PFM(Pulse Frequency Modulation) and PWM auto change mode utilized power save operation at light load current. Features No External components required SMPS BGA-MD Fast transient response Automatic PFM/PWM operation Forced PWM operation Typical Application Circuit(s) Internal Soft Start Under voltage lockout Over current protection VIN VOUT Vin=2.3~5.5V A3 A1 Vout Thermal shutdown VIN Ultra small and low profile package A2 EN MODE From From B2 B1 Lineup Controller Controller GND C3 Part No. Output voltage GND GND GND C2 C1 GND BZ6A1206GM 1.20V Figure 1. Typical Application Circuit(s) BZ6A7D06GM 1.25V Pin Description(s) Pin Configuration(s) (Top View) Pin No. Symbol Name Function Coil 1 A1 VOUT Output pin 2 A2 VIN Power supply input pin Cin 3 A3 VIN Power supply input pin Co 4 B1 MODE Forced PWM mode pin 5 B2 EN Enable pin 6 C1 GND GND pin 7 C2 GND GND pin INDEX 8 C3 GND GND pin MARK Figure 2. Pin Configuration(s) www.rohm.com TSZ02201-0F2F0A100020-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/16 TSZ2211114001 24.Jul.2012 Rev.001Datasheet BZ6Axx06GM Series Block Diagram(s) L PWM/PFM MODE H PWM MODE MODE VIN PWM/PFM TSD UVLO Cin 2.3 5.5V control FB VOUT L Switching - VOUT + Control Logic Co and ERROR COMP Gate Driver VREF EN H ON Frequency SHUTDOWN L OFF control GND Cin : C1005X5R0J225M Co : C1005X5R0J475M Figure 3. Block Diagram(s) L : MLP2012V1R0M Description of Block(s) The BZ6Axx06GM are a synchronous step-down DC/DC converter that achieves fast transient response from light load to heavy load by hysteretic PWM control system and current constant PFM control system. PWM control BZ6Axx06GM operates by hysteretic PWM control. This scheme ensures fast switching, high efficiency, and fast transient response. When the output voltage is below the VREF voltage, the error comparator output is low to high and turning on P-channel MOSFET until above the VREF voltage and minimum on time. PFM control At light load the regulator and MODE=low, the regulator operates with reduced switching frequency and improves the efficiency. During PFM operation, the output voltage slightly higher than typical output voltage. Figure 4. Operation of PFM mode and PWM mode w ww.rohm.com TSZ02201-0F2F0A100020-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/16 TSZ2211115001 24.Jul.2012 Rev.001