LM26003MH NSC [National Semiconductor], LM26003MH Datasheet - Page 4

• Manufacturer Part Number: LM26003MH
• Description: 3A Switching Regulator with High Efficiency Sleep Mode
• Manufacturer: NSC [National Semiconductor]

www.national.com
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be
operated beyond such conditions.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, T
and the ambient temperature, T
maximum power dissipation of 3.1W is determined using T
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 4: Below 4.0V input, power dissipation may increase due to increased R
within specification. A minimum of 3.9V (typical) is also required for startup.
Note 5: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 6: 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.
Note 7: The absolute maximum specification applies to DC voltage. An extended negative voltage limit of -3V applies for a pulse of up to 200 ns, and -6V for a
pulse of up to 50 ns.
T
T
TH
TH
I
Protection
I
V
F_min_sc
V
I
R
V
TSD
θ
Logic
Vth
I
V
I
EA
gm
I
V
BOOT
LIMPK
PGOOD_HI
EN_Source
FPWM
COMP
JA
OFFMIN
ONMIN
FB_SC
TH_PGOOD
DS_PGOOD
UVLO
TH_FPWM
COMP
SLEEP_HYS
WAKE
EN
Symbol
Minimum Off-time
Minimum On-time
Sleep Mode Threshold Hysteresis
Wake Up Threshold
BOOT Pin Leakage Current
Peak Current Limit
Short Circuit Frequency Foldback
Threshold
Min Frequency in Foldback
Power Good Threshold
PGOOD Hysteresis
PGOOD Leakage Current
PGOOD On Resistance
Under-voltage Lock-Out Threshold
Thermal Shutdown Threshold
Thermal Resistance
Enable Threshold Voltage
Enable Hysteresis
EN Source Current
FPWM Threshold
FPWM Leakage Current
Error Amp Trans-conductance
COMP Source Current
COMP Sink Current
COMP Pin Voltage Range
A
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
Parameter
A
= 25°C, θ
JA
= 32°C/W, and T
VFB rising, % of TH
Measured at falling FB
COMP = 0.6V
BOOT = 6V, SW = GND
Measured at FB falling
VFB < 0.3V
Measured at FB, PGOOD
rising
PGOOD = 5V
PGOOD sink current = 500 µA
Vin falling , shutdown, VDD =
VIN
Vin rising, soft-start, VDD =
VIN
Power dissipation = 1W
0 lfpm air flow
Enable rising
EN = 0V
FPWM = 5V
VCOMP = 0.9V
VCOMP = 0.9V
DS(ON)
4
. Therefore, a minimum input voltage of 4.0V is required to operate continuously
Conditions
J_MAX
= 125°C.
WAKE
J_MAX
, the junction-to-ambient thermal resistance, θ
0.575
3.15
2.70
3.70
Min
400
0.8
0.8
89
2
(Note 5)
101.3
1.236
0.001
0.87
1.25
2.96
3.99
1.18
4.85
1.24
D_MAX
Typ
300
190
150
160
180
675
4.7
45
92
32
57
57
6
3
= (T
J_MAX
1.365
1000
Max
6.05
3.30
4.30
5.0
1.4
1.6
95
8
- T
A
) /θ
µmho
°C/W
JA
Unit
kHz
mV
µA
nA
µA
nA
µA
µA
°C
ns
ns
. The
%
%
%
V
A
V
Ω
V
V
V
V
JA
,