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Technical parameters

Datasheet-verified parameters

20 items
ParameterValue and test conditionsSource
Input Voltage Range4.5V 至 24V
Continuous Output Current2A
High-Side RDS(ON)Typ 90 mΩ (V_BST-SW=5V)
Low-Side RDS(ON)Typ 40 mΩ (V_CC=5V)
Integrated InductanceTyp 1 μH
Inductor DCRMin 25 mΩ, Typ 45 mΩ, Max 65 mΩ (T_J=25°C)
Current LimitMin 3.15 A, Typ 4.25 A (Duty < 40%)
Switching FrequencyMin 1600 kHz, Typ 2000 kHz, Max 2400 kHz (V_FB=0.75V, T_J=+25°C)
Maximum Duty CycleMin 78%, Typ 83%, Max 88% (V_FB=700mV, T_J=+25°C)
Feedback VoltageMin 786 mV, Typ 798 mV, Max 810 mV (T_J=25°C)
Quiescent CurrentTyp 0.3 mA, Max 0.39 mA (V_FB=1V, T_J=+25°C)
Shutdown Supply CurrentTyp 6.5 μA, Max 8 μA (V_EN=0V, T_J=+25°C)
VCC Regulator VoltageMin 4.75 V, Typ 4.9 V, Max 5.05 V (T_J=+25°C)
Soft-Start TimeMin 0.8 ms, Typ 1.6 ms, Max 2.4 ms (V_OUT 10% to 90%, T_J=+25°C)
Thermal Shutdown TemperatureTyp 150 °C
Input UVLO ThresholdMin 3.7 V, Typ 3.9 V, Max 4.1 V (Rising, T_J=+25°C)
Continuous Dissipation Power2.7 W (T_A = +25°C)
Storage Temperature-65°C 至 150°C
PackageQFN-20 (3mm x 5mm x 1.6mm)
Protection Features过流保护 (OCP), 过温关断保护 (TSD), 欠压锁定 (UVLO)
All parameters (9)ExpandCollapse
Power
供电电压 (VIN)4.5 V 至 24 V
输出电压 (VOUT)0.8 V 至 VIN * DMAX
连续负载电流2A
AC and DC characteristics
振荡器频率 (fSW)2000 kHz (Typ)
Environment and package
封装QFN-20 (3mm x 5mm x 1.6mm)
Other
上管导通内阻 (HSRDS-ON)90 mΩ (Typ)
下管导通内阻 (LSRDS-ON)40 mΩ (Typ)
工作结温 (TJ)-55°C 至 +125°C
集成电感值 (L)1 μH (Typ)

Pinout and package

顶部视角
顶部视角
Package: QFN-20 (3mm x 5mm x 1.6mm)
PinNameFunctionSource
1FB: Feedback pin, used to set output voltage
2VCC: Internal 4.9 V LDO output pin
3AGND: Analog ground, reference ground for logic circuits
11BST: Bootstrap pin, internal bootstrap capacitor integrated
16IN: Supply voltage input pin, range +4.5 V to +24 V
17EN: Enable pin, high to enable, floating or ground to disable
18PG: Power Good output indicator pin, open-drain output
10,15,19,20NC: No connect, must be left floating
12,13,14PGND: Power ground, power reference ground
4,5,6SW: Switch output pins
7,8,9OUT: Power output pins, connect load here

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