F e a t u r e s
Up to 95% Efficiency
Current mode operation for excellent line and load transient respon
Low quiescent current: 460µA
Low Switch on Resistance R DS(ON), Internal Switch: 0.35Ω
Output voltage：0.6V～5.5V
冰心 笑Automatic PWM/PFM mode switching
No Schottky diode required
1.4MHz fixed frequency switching
illuminatiShort-Circuit protection
Shutdown quiescent current: < 1µA
Low profile DFN3*3-10L package (lead-free packaging is now available)
A p p l i c a t i o n
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handts and DSL modems
PC cards
Portable media players D e s c r i p t i o n
The HX1106 is high efficiency synchronous, dual PWM step-down DC/DC converters working under an input voltage range of 2.5V to 5.5V. This feature makes the HX1106 suitable for single Li-Lon battery-powered applications. 100% duty cycle capability extends battery life in portable devices, while the quiescent current is 200µA with no load, and drops to < 1µA in shutdown.
The internal synchronous switch is desired to increa efficiency without an external Schottky diode. The 1.4 MHz fixed switching frequency allows the using of tiny, low profile inductors and ceramic capacitors, which minimized overall solution footprint.免费翻译网站
The HX1106 converters are available in the industry standard DFN3*3-10L power packages (or upon request).
T y p i c a l A p p l i c a t i o n
P i n A s s i g n m e n t
DFN3*3-10L
PIN NUMBER DFN3*3-10L
PIN NAME
FUNCTION
1 EN1 ON/OFF Control 1 (High Enable)
2 FB1 Output feedback 1
3
VIN2 Input 2 4
GND Ground 5 SW2 Switch Output 2 6 EN2
ON/OFF Control 2 (High Enable)
7 FB2 Output feedback 2
8 VIN1 Input 1 9 GND Ground 10
SW1
Switch Output 1
A b s o l u t e M a x i m u m R a t i n g s
Power Dissipation………………………………………………………………………Internally limited V IN …………………………………………………………………………………………..- 0.3 V ～ + 6 V V ON/OFF ……………………………………………..……………………...……- 0.3 V ～ (V IN + 0.3) V V SW …………………………………………………………………………………- 0.3 V ～ (V IN + 0.3) V V FB ……………………………………………………………………………………….....- 0.3 V ～ + 6 V I SW ………………………………………………………………………………………………………..1.3A Operating Temperature Range ……………………………………………………...- 40 ℃～ + 85℃ Lead Temperature (Soldering 10 c.) ………………………………………………………..+ 300℃ Storage Temperature Range ……………………………………………………….- 65 ℃～ + 150℃ Junction Temperature ……………………………………………………………………………+ 125℃
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
Operating Conditions: T A =25, V ℃IN =3.6V unless otherwi specified.
EFFI = [(Output Voltage × Output Current) / (Input Voltage × Input Current)] × 100%
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS V OUT Output Voltage I OUT = 100mA, R2(4)/R1(3)=2 1.75 1.80 1.85 V V IN Input Voltage Range
2.5 5.5 V V FB Regulated Voltage T A = 25℃ 0.5880
0.6 0.6120 V I FB Feedback Current
±30 nA ∆V FB V REF韩国 旅游
V IN =2.5V~5.5V
0.03 0.4 %/V F OSC Oscillator Frequency V FB = 0.6V or V OUT = 100%
1.1 1.4 1.7 MHz I Q Quiescent Current V FB = 0.5V or V OUT = 90%, I LOAD = 0A 200 300 µA I S Shutdown Current V EN = 0V, V IN = 4.2V
0.1 1 µA I PK
Peak Inductor Current
日文原来如此
V IN = 3V, V FB = 0.5V or V OUT = 90%,
Duty Cycle < 35%
0.75
0.9
1
A
R PFET R DS(ON) of P-Channel FET I SW = 100mA 0.3 Ω R NFET R DS(ON) of N-Channel FET I SW = -100mA
sparkling
0.39 Ω EFFI ＊
Efficiency
When connected to ext. components
V IN =EN=3.6 V, I OUT =100mA
93 % ∆V OUT V OUT Line Regulation V IN =2.5V~5.5V 0.03 0.3 %/V V LOADREG
V OUT Load Regulation
0.33
%
T y p i c a l P e r f o r m a n c e C h a r a c t e r i s t i c s
lo control
Output Noi （100mV/DIV 2ms/DIV
脑外伤
AC COUPLED ）
V IN =3.6V V OUT =1.8V I LOAD =0mA
Output Noi （20mV/DIV 10ms/DIV Start –up from Shutdown Input and
AC COUPLED ） Output Noi （1V/DIV 100ns/DIV ）
V IN =3.6V V OUT =1.8V I LOAD =200mA
A p p l i c a t i o n I n f o r m a t i o n
PIN ASSIGNMENT
EN1 (Pin 1): First en control Input. Forcing this pin above 1.5V enables the part. Forcing this pin below 0.3V shuts down the device. In shutdown, all functions are disabled drawing <1µA supply current. Do not leave EN floating.
FB1(Pin 2): Output feedback 1. Receive the feedback voltage from an external resistive divider across the output. In the adjustable version, the output voltage is t by a resistive divider according to the following formula: V OUT1 = 0.6V • [1 + (R1/R2)].
逗号的作用VIN2 (Pin 3): Second main Supply Pin. It must be cloly decoupled to GND, or with a 10µF or greater ceramic capacitor. GND (Pin 4，9): Ground Pin.
SW2 (Pin 5): Second switch Node Connection to Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches.
EN2 (Pin 6): Second en control Input. Forcing this pin above 1.5V enables the part. Forcing this pin below 0.3V shuts down the device. In shutdown, all functions are disabled drawing <1µA supply current. Do not leave EN floating. FB2(Pin 7): Output feedback 2. Receive the feedback voltage from an external resistive divider across the output. In the adjustable version, the output voltage is t by a resistive divider according to the following formula: V OUT2 = 0.6V • [1 + (R3/R4)].
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VIN1 (Pin 8): First main Supply Pin .It must be cloly decoupled to GND, or with a 10µF or greater ceramic capacitor.
SW1 (Pin 10): First switch Node Connection to Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches.
