FAN5069_08 Datasheet, PDF (5/22 Pages) Fairchild Semiconductor – PWM and LDO Controller Combo

Electrical Characteristics
Unless otherwise noted, V_CC = 5V, T_A = 25°C, using circuit in Figure 1.
The ‘•’ denotes that the specifications apply to the full ambient operating temperature range. See Notes 4 and 5.
Symbol
Parameter
Conditions
Min.
Supply Current
I_VCC
I_VCC(SD)
I_VCC(OP)
V_CC Current (Quiescent)
V_CC Current (Shutdown)
V_CC Current (Operating)
V_SHUNT V_CC Voltage⁽⁶⁾
HDRV, LDRV Open
• 2.6
EN = 0V, V_CC = 5.5V
•
EN = 5V, V_CC = 5.0V,
Q_FET = 20nC, F_SW = 200kHz
Sinking 1mA to 100mA at V_CC
5.5
Pin
Under-Voltage Lockout (UVLO)
UVLO(H)
UVLO(L)
Rising V_CC UVLO Threshold
Falling V_CC UVLO Threshold
V_CC UVLO Threshold
Hysteresis
• 4.00
• 3.60
Soft-Start
I_SS Current
V_LDOSTART LDO Start Threshold
V_SSOK PWM Protection Enable
Threshold
Oscillator
F_OSC Frequency
R(T) = 56KΩ ± 1%
240
R(T) = Open
160
Frequency Range
160
ΔV_RAMP Ramp Amplitude
(Peak-to-Peak)
R(RAMP) = 330KΩ
Minimum ON Time
F = 200kHz
Reference
V_REF
Reference Voltage
(Measured at FB Pin)
Current Amplifier Reference
(at SW node)
T_A = 0°C to 70°C
T_A = -40°C to 85°C
• 790
• 788
Error Amplifier
DC Gain
GBWP Gain-BW Product
S/R Slew Rate
10pF across COMP to GND
Output Voltage Swing
No Load
• 0.5
I_FB FB Pin Source Current
Gate Drive
R_HUP HDRV Pull-up Resistor
Sourcing
•
R_HDN HDRV Pull-down Resistor Sinking
•
R_LUP LDRV Pull-up Resistor
Sourcing
•
R_LDN LDRV Pull-down Resistor
Sinking
•
Typ.
3.2
200
10
4.25
3.75
0.50
10
2.2
1.2
300
200
0.4
200
800
800
160
80
25
8
1
1.8
1.8
1.8
1.2
Max. Unit
3.8 mA
400 μA
15 mA
5.9
V
4.50 V
4.00
V
V
μA
V
V
360 KHz
240 KHz
600 KHz
V
nS.
810 mV
812 mV
mV
dB
MHz
V/μS.
4.0
V
μA
3.0
Ω
3.0
Ω
3.0
Ω
2.0
Ω
© 2005 Fairchild Semiconductor Corporation
FAN5069 Rev. 1.1.5
5
www.fairchildsemi.com