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TSZ02201-0J3J0AJ00110-1-2

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ROHM Co., Ltd. All rights reserved.

10/17

02.MAR.2012 Rev.001

TSZ22111･15･001

0J3J0AJ00110

Datasheet

Information on Advantages

Advantage 1：Offers fast transient response with current mode control system.

Fig.24 Comparison of transient response

Advantage 2： Offers high efficiency for all load range.

・For lighter load:

Utilizes the current mode control mode called SLLM for lighter load, which reduces various dissipation such as switching

Achieves efficiency improvement for lighter load.

・For heavier load:

Utilizes the synchronous rectifying mode and the low on-resistance

MOS FETs incorporated as power transistor.

ON resistance of P-

channel MOS FET : 0.3Ω(Typ.)

ON resistance of N-

channel MOS FET : 0.2Ω(Typ.)

Fig.25 Efficiency

Achieves efficiency improvement for heavier load.

Offers high efficiency for all load range with the improvements mentioned above.

Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.

Reduces a mounting area required.

Fig.26 Example application

・

Output capacitor Co required for current mode control: 10μF ceramic capacitor

・

Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor

0.001

0.01

0.1

1

0

50

100

①

②

PWM

SLLM

TM

①inprovement by SLLM system

②improvement by synchronous rectifier

Output current Io[A]

Ta=25℃

Ta=25℃

Io=50→125mA

Io=125→50mA

DC/DC

Convertor

Controller

L

Co

Cin

8mm

8mm

L