LTC3815_15 Datasheet, PDF (3/42 Pages) Linear Technology – 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

LTC3815
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, V_IN = 3.3V unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
V_IN
V_OUT
I_Q
V_UVLO
I_REF
Input Supply Range
Output Voltage Programming Range
V_IN Supply Current
Normal Mode
Standby
Shutdown
V_IN Undervoltage Reset
Hysterisis
Reference Current
l 2.25
l 0.4
5.5
V
72% of V_IN
V
V_{RUN_MSTR} > 1V (Note 4)
V_{RUN_STBY} = 0V, V_{RUN_MSIR} > 1V
V_{RUN_MSTR} = 0V, V_SDA = V_SCL ≥ V_IN
5
8
mA
120
200
µA
1
µA
V_IN Rising
V_IN Falling
2.05 2.15
2.25
V
0.2
V
(Note 10)
l 99.2 100
100.8
µA
99.5 100
100.5
µA
ΔI_REF,LINE
Reference Current Line Regulation
V_IN = 2.5V to 5.5V (Note 10)
l
0.05
0.2
%/V
ΔV_OUT,OFFSET
Regulation Accuracy
ΔV_OUT,OFFSET = (V_{CC_SEN} – V_{SS_SEN}) – V_REF
V_REF = 1.5V (Notes 5, 10)
l –0.5
0.5
%
ΔV_OUT,MARGIN
Maximum Margining Range
Set Point Accuracy
Resolution
LSD Step Size
–25
25
%
MFR_VOUT_COMMAND = –25% to l –0.5
0.5
%
25%, V_REF = 1.5V (Note 5)
9
Bits
0.1
%
NL_V_OUT
A_EA
f_BW
R_IN
t_SS
I_CSLEW
I_LIM
DAC Nonlinearity
Error Amplifier Open Loop Gain
Error Amp Gain Bandwidth Product
Differential Amplier Input Resistance
Internal Soft-Start Time/V_REF
C_SLEW Pull-Up Current
SW Valley Current Limit
I_TH = 1V (Note 5)
(Note 6)
Measured at V_{CC_SEN} Pin
External C_SS = Float
V_CSLEW = 0V
Sourcing (Note 8)
Sinking
±1
LSB
80
dB
20
MHz
160
kΩ
1
ms/V
–10
µA
l 5.5
6.5
7.5
A
–6
A
I_{RUN_STBY}
V_{RUN_MSTR}
V_{RUN_STBY}
I_ASEL
I_PGFD
I_SS
V_IH,MARGIN
V_IL,MARGIN
I_WP
SR_MARGIN
Regulator On Source Current
Regulator On Threshold (Master Shutdown)
Regulator On Hysterisis
Regulator Power-Down Threshold
Regulator On Threshold (Standby Mode)
ASEL Programming Current
PGFD Programming Current
SS Current
MARGIN High Voltage
MARGIN Low Voltage
WP Pin Pull-Up Current
Reference Slew Rate During Margin Change
t_INIT
Initialization Time
Oscillator and Power Switch
V_{RUN_STBY} = 0V
Rising Edge
Falling Edge
I_Q < 10μA
V_SS = 0V
WP = 0V
C_SLEW = 1nF
C_SLEW = OPEN
C_SLEW = SV_IN
Delay from Power Applied Until
V_OUT Ramp Up
–2.5
µA
0.9
1
1.1
V
0.1
V
0.65
V
0.7
1
1.2
V
10
µA
10
µA
4
5
6
µA
1.2
V
0.4
V
10
µA
0.1
%/ms
23
%/ms
10
%/µs
1
2
ms
f_OSC
V_SYNC
Oscillator Frequency
SYNC Level High
SYNC Level Low
R_T = 25.5k
R_T = SV_IN
l 0.85
1.0
1.15
MHz
0.85
1.0
1.15
MHz
1.2
V
0.3
V
3815p
For more information www.linear.com/LTC3815
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