Datasheet

LM26001, LM26001Q
SNVS430G –MAY 2006–REVISED MAY 2006 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. Typical values represent the most likely parametric norm at T
J
= 25°C, and are provided for reference
purposes only.
(1)
Symbol Parameter Conditions Min Typ Max Unit
System
I
SD
(2)
Shutdown Current EN = 0V 10.8 20 µA
Iq
_Sleep_VB
(2)
Quiescent Current Sleep mode, VBIAS = 5V 38 70 µA
Iq
_Sleep_VDD
Quiescent Current Sleep mode, VBIAS = GND 75 125 µA
Iq
_PWM_VB
Quiescent Current PWM mode, VBIAS = 5V 150 230 µA
Iq
_PWM_VDD
Quiescent Current PWM mode, VBIAS = GND 0.65 0.85 mA
I
BIAS_Sleep
(2)
Bias Current Sleep mode, VBIAS = 5V 33 85 µA
I
BIAS_PWM
Bias Current PWM mode, VBIAS = 5V 0.5 0.70 mA
V
FB
Feedback Voltage 5V < Vin < 38V 1.2155 1.234 1.2525 V
I
FB
FB Bias Current ±200 nA
ΔV
OUT
/ΔV
IN
Vout line regulation 5V < Vin <38V 0.001 %/V
ΔV
OUT
/ΔI
OUT
Vout load regulation 0.8V < V
COMP
< 1.15V 0.07 %
VDD VDD output voltage 7V < Vin < 35V, I
VDD
= 0 mA to 5 5.50 5.95 6.50 V
mA
I
SS_Source
Soft-start source current 1.5 2.2 4.6 µA
V
bias_th
VBIAS On Voltage Specified at I
BIAS
= 92.5% of full 2.64 2.9 3.07 V
value
Switching
R
DS(ON)
Switch on Resistance Isw = 1A 0.12 0.2 0.42 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 1.2 1.6 V
SYNC falling 0.8 1.1
Sync pin hysteresis 114 mV
I
SYNC
SYNC leakage current 6 nA
F
SYNC_UP
Upper frequency synchronization range As compared to nominal f
SW
+30 %
F
SYNC_DN
Lower frequency synchronization range As compared to nominal f
SW
-20 %
T
OFFMIN
Minimum Off-time 365 ns
T
ONMIN
Minimum On-time 155 ns
TH
SLEEP_HYS
Sleep mode threshold hysteresis VFB rising, % of TH
WAKE
101.2 %
TH
WAKE
Wake up threshold Measured at falling FB, COMP = 1.234 V
0.6V
I
BOOT
BOOT pin leakage current BOOT = 16V, SW = 10V 0.0006 5.0 µA
Protection
I
LIMPK
Peak Current Limit 1.85 2.5 3.2 A
V
FB_SC
Short circuit frequency foldback Measured at FB falling 0.87 V
threshold
F_min_sc Min Frequency in foldback VFB < 0.3V 71 kHz
V
TH_PGOOD
Power Good Threshold Measured at FB, PGOOD rising 89 92 95 %
PGOOD hysteresis 2 7 8 %
(1) All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using
standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Iq and ISD specify the current into the VIN pin. 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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