1 Electrical Characteristics

Table 1-1. Absolute Maximum Ratings
PV_IN to PGND	–0.3V to +28V
V_IN to PGND	–0.3V to PV_IN
V_DD to PGND	–0.3V to +6V
V_SW, V_CS to PGND	−0.3V to (PV_IN + 0.3V)
V_BST to V_SW	–0.3V to +6V
V_BST to PGND	–0.3V to +34V
V_EN to PGND	−0.3V to (V_DD + 0.3V)
V_FB to PGND	−0.3V to (V_DD + 0.3V)
PGND to SGND	–0.3V to +0.3V
Notes: Exceeding the absolute maximum rating may damage the device. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.

Table 1-2. Operating Ratings
Supply Voltage (PV_IN, V_IN)	+4.5V to +26V
Output Voltage (V_OUT)	+0.8V to +5.5V
Bias Voltage (V_DD)	+4.5V to +5.5V
Enable Input (V_EN)	0V to V_DD
Maximum Power Dissipation	Note 2
The device is not guaranteed to function outside the operating range. P_D(MAX) = (T_J(MAX) – T_A)/θ_JA, where θ_JA depends upon the printed circuit layout. See the Application Information section for more information.

Table 1-3. Electrical Characteristics
PV_IN = V_IN =12V, V_DD = 5V; V_BST – V_SW = 5V; T_A = 25°C, unless noted. Bold values valid for −40°C ≤ T_J ≤ +125°C. (Note 1)
Parameter	Min.	Typ.	Max.	Units	Conditions
Power Supply Input
Input Voltage Range (V_IN, PV_IN)	4.5	—	26	V	—
V_DD Bias Voltage
Operating Bias Voltage (V_DD)	4.5	5	5.5	V	—
Undervoltage Lockout Trip Level	2.4	2.7	3.2	V	V_DD rising
UVLO Hysteresis	—	50	—	mV	—
Quiescent Supply Current	—	1.4	3	mA	V_FB = 1.5V (non-switching)
Shutdown Supply Current	—	0.7	2	mA	V_DD = V_BST = 5.5V, V_IN = 26V, SW = unconnected, V_EN = 0V
Reference
Feedback Reference Voltage	0.792	0.8	0.808	V	0°C ≤ T_J ≤ 85°C (±1.0%)
Feedback Reference Voltage	0.788	0.8	0.812	V	−40°C ≤ T_J ≤ 125°C (±1.5%)
Load Regulation	—	0.2	—	%	I_OUT = 0A to 5A
Line Regulation	—	0.1	—	%	V_IN = 4.5V to 26V
FB Bias Current	—	5	—	nA	V_FB = 0.8V
Enable Control
EN Logic Level High	—	1.2	—	V	4.5V < V_DD < 5.5V
EN Logic Level Low	—	0.78	—	V	4.5V < V_DD < 5.5V
EN Bias Current	—	50	—	µA	V_EN = 0V
Oscillator
Switching Frequency	225	300	375	kHz	Note 2
Maximum Duty Cycle	—	87	—	%	Note 3, V_FB = 0V
Minimum Duty Cycle	—	0	—	%	V_FB > 0.8V
Minimum Off Time	—	360	—	ns	—
Soft-Start
Soft-Start Time	—	6	—	ms	—
Short-Circuit Protection
Current Limit Threshold	—	16	—	A	V_FB = 0.8V
Short Circuit Current	—	6	—	A	V_FB = 0V
Internal FETs
Top-MOSFET R_DS(ON)	—	22.6	—	mΩ	I_SW = 1A
Bottom-MOSFET R_DS(ON)	—	13.6	—	mΩ	I_SW = 1A
SW Leakage Current	—	—	60	µA	V_IN = 26V, V_SW = 26V, V_EN = 0V, V_BST = 31.5V
VIN Leakage Current	—	—	25	µA	V_IN = 26V, V_SW = 0V, V_EN = 0V, V_BST = 31.5V
Thermal Protection
Overtemperature Shutdown	—	155	—	°C	T_J rising
Overtemperature Shutdown Hysteresis	—	10	—	°C	—
Specification for packaged product only. Measured in test mode. The maximum duty cycle is limited by the fixed mandatory off-time (t_OFF) of typically 360ns.

Table 1-4. Temperature Specifications
Parameter	Symbol	Min.	Typ.	Max.	Units	Conditions
Temperature Ranges
Junction Temperature Range	T_J	–40	—	+125	°C	—
Maximum Junction Temperature	T_J(MAX)	—	—	+150	°C	—
Storage Temperature Range	T_STORE	–65	—	+150	°C	—
Lead Temperature	T_LEAD	—	—	+260	°C	Soldering, 10 sec.
Package Thermal Resistances
Thermal Resistance, VQFN 28-Ld	θ_JA	—	36	—	°C/W	—