Datasheet

LM26003
SNVS576D –AUGUST 2008–REVISED MARCH 2013 www.ti.com
Electrical Characteristics
Specifications in standard type are for T
J
= 25°C only, and limits in boldface type apply over the junction temperature (T
J
)
range of -40°C to +125°C. Unless otherwise stated, Vin = 12V. Minimum and Maximum limits are ensured through test,
design, or statistical correlation.
Symbol Parameter Conditions Min Typ Max Unit
(1)
System
I
SD
(2)
Shutdown Current EN = 0V 10.8 20 µA
Iq
Sleep_VB
(2)
Quiescent Current Sleep mode, VBIAS = 5V 40 70 µA
Iq
Sleep_VDD
Quiescent Current Sleep mode, VBIAS = GND 76 125 µA
Iq
PWM_VB
Quiescent Current PWM mode, VBIAS = 5V 0.16 0.23 mA
FPWM = 2V
Iq
PWM_VDD
Quiescent Current PWM mode, VBIAS = GND 0.65 0.85 mA
FPWM = 2V
I
BIAS_Sleep
(2)
Bias Current Sleep mode, VBIAS = 5V 33 60 µA
I
BIAS_PWM
Bias Current PWM mode, VBIAS = 5V 0.5 0.7 mA
V
FB
Feedback Voltage 5V < Vin < 38V 1.217 1.236 1.255 V
I
FB
FB Bias Current VFB = 1.20V ±200 nA
ΔV
OUT
/ΔV
IN
Output Voltage Line Regulation 5V < Vin < 38V 0.00025 %/V
ΔV
OUT
/ΔI
OUT
Output Voltage Load Regulation 0.8V < V
COMP
< 1.15V 0.08 %/A
VDD VDD Pin Output Voltage 7V < Vin < 35V 5.50 5.99 6.50 V
I
VDD
= 0 mA to 5 mA
I
SS_Source
Soft-start Source Current 1.5 2.5 4.6 µA
V
bias_th
VBIAS On Voltage Specified at IBIAS = 92.5% of 2.64 2.9 3.07 V
full value
Switching
R
DS(ON)
Switch On Resistance Isw = 2A 0.040 0.095 0.200 Ω
I
sw_off
Switch Off State Leakage Current Vin = 38V, VSW = 0V 0.002 5.0 µA
f
sw
Switching Frequency RFREQ = 62k, 124k, 240k ±10 %
V
FREQ
FREQ Voltage 1.0 V
f
SW
range Switching Frequency Range 150 500 kHz
V
SYNC
Sync Pin Threshold SYNC rising 1.23 1.6 V
SYNC falling 0.8 1.10
Sync Pin Hysteresis 135 mV
I
SYNC
SYNC Leakage Current 2 nA
F
SYNC_UP
Upper Frequency Synchronization As compared to nominal f
SW
+30 %
Range
F
SYNC_DN
Lower Frequency Synchronization As compared to nominal f
SW
-20 %
Range
T
OFFMIN
Minimum Off-time 300 ns
T
ONMIN
Minimum On-time 190 ns
TH
SLEEP_HYS
Sleep Mode Threshold Hysteresis VFB rising, % of TH
WAKE
101.3 %
TH
WAKE
Wake Up Threshold Measured at falling FB 1.236 V
COMP = 0.6V
I
BOOT
BOOT Pin Leakage Current BOOT = 6V, SW = GND 0.001 5.0 µA
(1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Iq and ISD specify the current into the VIN and AVIN pins. IBIAS is the current into the VBIAS pin when the VBIAS voltage is greater
than 3V. All quiescent current specifications apply to non-switching operation.
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