HX3029 2A同步升压芯片

w w w.h x s e m i.c o m

F e a t u r e s

Efficiency: Up to 93%

Current Mode Operation for Excellent Line

and Load Transient Response

Small SOP-8L Package

A p p l i c a t i o n s

Cellular Telephones

RF-Communications

Battery-Powered Equipment

Portable Instrument

Wireless Equipment

Telecom/Network Systems

D e s c r i p t i o n

The HX3029 is a compact and high efficiency

synchronous step-up DC/DC converter. The

boost converter includes current mode, fixed

frequency, pulse width modulation (PWM)

circuitry with external N-channel and P-channel

MOSFET driven by a constant frequency.

Current mode control provides improved

transient response and simplified loop

compensation. The HX3029 provides high

efficiency at a wide range of load current.

The HX3029 is available in a low profile SOP-8L

package.

T y p i c a l A p p l i c a t i o n C i r c u i t

* V OUT = 1.212V • [1 + (R1/R2)]

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李

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P i n A s s i g n m e n t a n d F u n c t i o n s

A b s o l u t e M a x i m u m R a t i n g s(N o t e1)

Supply Voltage……………………………………………………………………….... −0.3V to 6.5V SW Pin Switch Voltage…………………………………………………………………−0.3V to 6.5V EN, FB Voltages………………………………………………………………………………−0.3V to 2.4V Other I/O Pin Voltages……………………………………………………….. −0.3V to (VDD + 0.3V) PDRI, NDRI Peak Output Current (<10μs) ………………………………………………...…………..1A Operating Junction Temperature…………………………………………………….…………..125°C Storage Temperature Range ……………………………………………………….−65°C ~ +150°C

N o t e1: Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits.

E l e c t r i c a l C h a r a c t e r i s t i c s

(V IN = 3.3V, V OUT set to 5V, Load Current = 0, T A = 25°C, unless otherwise specified)

Parameter Test Conditions Min Typ Max Units Start-up Voltage I OUT = 1mA 0.9 V Operating VDD Range VDD Pin Voltage 2.5 5 V Supply Current (Quiescent) EN = 0V 300 μA Feedback Reference Voltage 1.212 V Switching Frequency VDD = 3.3V 400 KHz EN High Threshold V EN Rising V

EN Low Threshold V

EN Input Bias Current V EN = 0V, 5V μA Note: The EN pin shall be tied to VDD pin and inhibit to act the ON/OFF state whenever the VDD pin voltage may reach to 5V or above.