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BD9639MWV-E2 Datasheet(PDF) 8 Page - Rohm |
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BD9639MWV-E2 Datasheet(HTML) 8 Page - Rohm |
8 / 26 page BD9639MWV 8/22 TSZ02201-0313AA400630-1-2 © 2016 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ22111・15・001 09.Feb.2016 Rev.001 (4) CH1 (a) Function Selectable PWM/PFM boost DC/DC converter. Output voltage is ranges from 3.7[V] to 5.5[V]. Low voltage operation starts up from 2.5[V] and also provides supply voltage to VREF circuit. (b) Recommended External Components (At the time of setting when VOUT1=5.0V) Parts Name Value Maker Part Number R11 620[kΩ] +24[kΩ] - - R12 56[kΩ] - - R13 10[Ω] - - C11 22[µF] (x2) Taiyo Yuden JMK212BJ226MG C12 10[µF] Taiyo Yuden JMK212BJ106KG C13 100[pF] Taiyo Yuden UMK1005CH101JV C14 1[µF] Taiyo Yuden JMK105BJ105KV L11 2.2[µH] Taiyo Yuden NR4018T2R2N D11 - ROHM RB060M-30 (c) Start-up Sequence (d) PWM/PFM Select PWM/PFM (operation of XSHDN=HIGH and XSHDN24) with light load (10mA or less). Electricity is discharged XSHDN1 0[V] H input voltage OUT1 0[V] ≈ VBAT[V] VBAT 2.5[V] to 5.5[V] Soft start period according to the load. 0[V] 3.7[V] to 5.5[V] PFM operation XSHDN24 3.7[V]to 5.5[V] OUT1 (Load 5mA or less) PWM operation (Load 5mA or less) PFM operation 0[V] H input voltage FB1 VOUT1 VOUT1 PFM PWM C13 R11 R12 0.4[V] PRE DRIVER Start up circuit SW1 PGND1 VOUT1 C11 VBAT L11 PWM/PFM VBAT C14 VBAT MAX. DUTY D11 R13 C12 OUT1 OUT1 OUT1 MAX |
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