SNVSB23 March 2018 LP87521-Q1 , LP87522-Q1 , LP87523-Q1 , LP87524-Q1 , LP87525-Q1
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Descriptions
- 8.3.1 Multi-Phase DC/DC Converters
- 8.3.2 Sync Clock Functionality
- 8.3.3 Power-Up
- 8.3.4 Regulator Control
- 8.3.5 Enable and Disable Sequences
- 8.3.6 Device Reset Scenarios
- 8.3.7 Diagnosis and Protection Features
- 8.3.8 GPIO Signal Operation
- 8.3.9 Digital Signal Filtering
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 8.6.1
Register Descriptions
- 8.6.1.1 OTP_REV
- 8.6.1.2 BUCK0_CTRL1
- 8.6.1.3 BUCK1_CTRL1
- 8.6.1.4 BUCK2_CTRL1
- 8.6.1.5 BUCK3_CTRL1
- 8.6.1.6 BUCK0_VOUT
- 8.6.1.7 BUCK0_FLOOR_VOUT
- 8.6.1.8 BUCK1_VOUT
- 8.6.1.9 BUCK1_FLOOR_VOUT
- 8.6.1.10 BUCK2_VOUT
- 8.6.1.11 BUCK2_FLOOR_VOUT
- 8.6.1.12 BUCK3_VOUT
- 8.6.1.13 BUCK3_FLOOR_VOUT
- 8.6.1.14 BUCK0_DELAY
- 8.6.1.15 BUCK1_DELAY
- 8.6.1.16 BUCK2_DELAY
- 8.6.1.17 BUCK3_DELAY
- 8.6.1.18 GPIO2_DELAY
- 8.6.1.19 GPIO3_DELAY
- 8.6.1.20 RESET
- 8.6.1.21 CONFIG
- 8.6.1.22 INT_TOP1
- 8.6.1.23 INT_TOP2
- 8.6.1.24 INT_BUCK_0_1
- 8.6.1.25 INT_BUCK_2_3
- 8.6.1.26 TOP_STAT
- 8.6.1.27 BUCK_0_1_STAT
- 8.6.1.28 BUCK_2_3_STAT
- 8.6.1.29 TOP_MASK1
- 8.6.1.30 TOP_MASK2
- 8.6.1.31 BUCK_0_1_MASK
- 8.6.1.32 BUCK_2_3_MASK
- 8.6.1.33 SEL_I_LOAD
- 8.6.1.34 I_LOAD_2
- 8.6.1.35 I_LOAD_1
- 8.6.1.36 PGOOD_CTRL1
- 8.6.1.37 PGOOD_CTRL2
- 8.6.1.38 PGOOD_FLT
- 8.6.1.39 PLL_CTRL
- 8.6.1.40 PIN_FUNCTION
- 8.6.1.41 GPIO_CONFIG
- 8.6.1.42 GPIO_IN
- 8.6.1.43 GPIO_OUT
- 8.6.1
Register Descriptions
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
9.2.3 Application Curves
Unless otherwise specified: VIN = 3.7 V, VOUT = 1 V, V(NRST) = 1.8 V, TA = 25°C, ƒSW = 2 MHz, L = 0.47 µH (TOKO DFE252012PD-R47M), COUT = 22 µF / phase, and CPOL = 22 µF / phase. Measurements are done using connections in the Typical Applications schematics.
| VOUT = 1.8 V |
| VOUT = 1.8 V |
| VIN = 3.3 V |
| VIN = 3.3 V |
| VIN = 5 V |
| VIN = 5 V |
| VOUT = 1 V | Load = 1 A |
| VOUT = 1 V | Load = 1 A |
| Load = 4 A (PWM) and 0.1 A (PFM) | ||
(4-Phase Output)
| Load = 2 A (PWM) and 0.1 A (PFM) | ||
(2-Phase Output)
| IOUT = 0 A | Slew-Rate = 3.8 mV/µs |
(3-Phase Output)
| IOUT = 0 A | Slew-Rate = 3.8 mV/µs |
(1-Phase Output)
| RLOAD = 0.33 Ω | Slew-Rate = 3.8 mV/µs |
(3-Phase Output)
| RLOAD = 1 Ω | Slew-Rate = 3.8 mV/µs |
(1-Phase Output)
| RLOAD = 0.33 Ω | Slew-Rate = 3.8 mV/µs |
(3-Phase Output)
| RLOAD = 1 Ω | Slew-Rate = 3.8 mV/µs |
(1-Phase Output)
| IOUT = 10 mA |
(3-Phase Output)
| IOUT = 10 mA |
(1-Phase Output)
| IOUT = 200 mA |
(3-Phase Output)
| IOUT = 200 mA |
(1-Phase Output)
(3-Phase Output)
(1-Phase Output)
(3-Phase Output)
(1-Phase Output)
(3-Phase Output)
(4-Phase Output)
(2-Phase Output)
| IOUT = 0.1 A → 6 A → 0.1 A | ||
| TR = TF = 1 µs | ||
(3-Phase Output)
| IOUT = 0.1 A → 2 A → 0.1 A | ||
| TR = TF = 1 µs | ||
(1-Phase Output)
| IOUT = 0.1 A → 6 A → 0.1 A | ||
| TR = TF = 1 µs | ||
Forced-PWM Mode (3-Phase Output)
| IOUT = 0.1 A → 2 A → 0.1 A | ||
| TR = TF = 1 µs | ||
Forced-PWM Mode (1-Phase Output)
(3-Phase Output)
| VOUT = 1.8 V |
| VOUT = 1.8 V |
| VIN = 3.3 V |
| VIN = 3.3 V |
| VIN = 5 V |
| VIN = 5 V |
Figure 53. Output Voltage vs Load Current in PFM/PWM Mode (1-Phase Output) 
| VOUT = 1 V | Load = 1 A |
| VOUT = 1 V | Load = 1 A |
| Load = 3 A (PWM) and 0.1 A (PFM) | ||
(3-Phase Output)
| Load = 1 A (PWM) and 0.1 A (PFM) | ||
(1-Phase Output)
| IOUT = 0 A | Slew-Rate = 3.8 mV/µs |
(4-Phase Output)
| IOUT = 0 A | Slew-Rate = 3.8 mV/µs |
(2-Phase Output)
| RLOAD = 0.25 Ω | Slew-Rate = 3.8 mV/µs |
(4-Phase Output)
| IOUT = 0.5 Ω | Slew-Rate = 3.8 mV/µs |
(2-Phase Output)
| RLOAD = 0.25 Ω | Slew-Rate = 3.8 mV/µs |
(4-Phase Output)
| IOUT = 0.5 Ω | Slew-Rate = 3.8 mV/µs |
(2-Phase Output)
| IOUT = 10 mA |
(4-Phase Output)
| IOUT = 10 mA |
(2-Phase Output)
| IOUT = 200 mA |
(4-Phase Output)
| IOUT = 200 mA |
(2-Phase Output)
(4-Phase Output)
(2-Phase Output)
(4-Phase Output)
(2-Phase Output)
(4-Phase Output)
(2-Phase Output)
(3-Phase Output)
| IOUT = 0.1 A → 8 A → 0.1 A | ||
| TR = TF = 1 µs | ||
(4-Phase Output)
| IOUT = 0.1 A → 4 A → 0.1 A | ||
| TR = TF = 1 µs | ||
(2-Phase Output)
| IOUT = 0.1 A → 8 A → 0.1 A | ||
| TR = TF = 1 µs | ||
Forced-PWM Mode (4-Phase Output)
| IOUT = 0.1 A → 4 A → 0.1 A | ||
| TR = TF = 1 µs | ||
Forced-PWM Mode (2-Phase Output)
(4-Phase Output)
