SY7088 高效率5V1A同步升压芯片

1
深圳昱灿电子
专业电源管理芯片 DCDC升压 降压 LDO 锂电池充电等 联系人：李先生
SY7088
Pinout (top view)
(DFN2x3-8)
Top mark: VTxyz (Device code: VT, x=year code, y=week code, z= lot number code) Name LX EN SGND FB IN OUT PGND DFN2x3-8 1, 2 3 4 5 6 7, 8 9 Description Inductor node. Connect an inductor between IN pin and LX pin. Enable pin. Internal integrated with 1Mohm pull down resistor. Signal ground pin. Feedback pin. Connect a resistor RH between OUT and FB, and a resistor RL between FB and GND to program the output voltage. VOUT=1.2V*(RH/RL+1). Signal input pin. Decouple this pin to GND pin with at least 1.0uF ceramic cap for noise immunity consideration. Power output pin. Decouple this pin to GND pin with at least 10uF ceramic cap. Power ground pin.
Ordering Number SY7088DGC
Package type DFN2x3-8
Typical Applications
Figure 1. Schematic Diagram
Figure 2. Efficiency Figure
AN_SY7088 Rev. 0.1A
Silergy Corp. Confidential- Prepared for Internal Use Only
SY7088
Electrical Characteristics
(VIN =2.4V, VOUT=5V, IOUT=500mA, TA = 25°C unless otherwise specified)
Parameter Input Voltage Output Voltage Range Quiescent Current Shutdown Current Linear charge current Soft-start time Input Vin UVLO threshold Vin UVLO hysteresis EN Rising Threshold EN Falling Threshold Low Side Main FET RON Synchronous FET RON Main FET Current Limit Feedback Reference Voltage Minimum on time Max on time OUT pin OVP protection OUT pin OVP hysteresis Thermal Shutdown Temperature Thermal Shutdown hysteresis VIN VOUT
(Note 1) EN-----------------------------------------------------------------------------------------------------------------------VOUT+0.3V Other Pins----------------------------------------------------------------------------------------------------------------------- 6V Power Dissipation, PD@ TA=25°C DFN2x3-8-------------------------------------------------------------------------- TBD Package Thermal Resistance (Note 2) θ JA ---------------------------------------------------------------------------------------------------------------- TBD θ JC ---------------------------------------------------------------------------------------------------------------- TBD Junction Temperature Range -------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------- -65°C to 150°C (Note 3) IN ------------------------------------------------------------------------------------------------------------------- 2.3V to 5.25V OUT----------------------------------------------------------------------------------------------------------------- 2.5V to 5.5V EN, FB-------------------------------------------------------------------------------------------------------- 0V to VOUT+0.3V Junction Temperature Range -------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------- -40°C to 85°C
SY7088 is a high efficiency synchronous boost regulator that converts up to 5.5V output voltage. It adopts NMOS for the main switch and PMOS for the synchronous switch. It can disconnect the output from input during the shutdown mode.
Features
• • • • • • • • 2.3-5.0V input voltage range Adjustable output voltage from 2.5V to 5.5V Pseudo-constant frequency: 1MHz 3A peak current limit Input under voltage lockout Load disconnect during shutdown Output over voltage protection Low RDS(ON) (main switch/synchronous switch) at 5.0V output: 70/100mohm • Compact package: DFN2x3-8
Absolute Maximum Ratings
Recommended Operating Conditions
AN_SY7088 Rev. 0.1A
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Silergy Corp. Confidential- Prepared for Customer Use Only
2
深圳昱灿电子
专业电源管理芯片 DCDC升压 降压 LDO 锂电池充电等 联系人：李先生
Application Note: SY7088
2.3V Minimum Input and 5.5V Maximum Output 3A Peak Current Synchronous Boost with Output Disconnect Preliminary Specification
General Description
Ordering Information
SY7088 □(□□)□ Tempera ture Code Packa ge Code Optiona l Spec Code
Applications
Note ---• All Single Cell Li or Dual Cell Battery Operated Products as MP-3 Player, PDAs, and Other Portable Equipment.
Typ
Max 5.25 5.5
Io=0A,VEN=VIN=2.3V, VOUT=5.0V VEN=0V, VIN=2.4V VOUT<1V 1V≤VOUT<VIN -0.2V
2 30 0.1 1.2 1.0 0.5 0.1 1.2
1
Unit V V µA µA µA A
2.3
0.4 VOUT=5.0V VOUT=5.0V 3 1.182 70 100 1.2 100 2 6 0.2 150 20 1.218
ms V V V V mΩ mΩ A V ns µs V V ℃ ℃
Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2:
Symbol VIN VOUT IQ ISHDN ICHARGE Tss VUVLO Vhys VENH VENL RDS(ON)1 RDS(ON)2 ILIM VREF TON_MIN TON_MAX VOVP VOVP_HYS TSD THYS
Test Conditions
Min 2.3 2.5